Annual report pursuant to Section 13 and 15(d)

Debt (Junior Subordinated Debentures Outstanding) (Details)

v3.10.0.1
Debt (Junior Subordinated Debentures Outstanding) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Carrying Value $ 71,323 $ 70,384
Junior subordinated debenture, purchase accounting adjustment 39,500 40,400
Junior Subordinated Debentures [Member]    
Debt Instrument [Line Items]    
Carrying Value 71,323 70,384
Initial Equity In Trust $ 3,327 [1] $ 3,327 [2]
Junior Subordinated Debentures [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Basis spread on rate   4.85%
BST I [Member]    
Debt Instrument [Line Items]    
Issue Date Mar. 15, 2005 Mar. 15, 2005
Interest Rate Terms 3-month LIBOR+ 4.90%  
Interest Rate 7.70% 6.59%
Maturity Date Mar. 30, 2035 Mar. 30, 2035
BST I [Member] | Junior Subordinated Debentures [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 14,900 $ 14,703
Initial Equity In Trust $ 696 [1] $ 696 [2]
BST I [Member] | Junior Subordinated Debentures [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Basis spread on rate 4.90% 4.90%
BST II [Member]    
Debt Instrument [Line Items]    
Issue Date May 04, 2005 May 04, 2005
Interest Rate Terms 3-month LIBOR + 4.85%  
Interest Rate 7.37% 6.23%
Maturity Date Jul. 30, 2035 Jul. 30, 2035
BST II [Member] | Junior Subordinated Debentures [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 16,688 $ 16,472
Initial Equity In Trust $ 774 [1] $ 774 [2]
BST II [Member] | Junior Subordinated Debentures [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Basis spread on rate 4.85%  
BST III [Member]    
Debt Instrument [Line Items]    
Issue Date May 10, 2005 May 10, 2005
Interest Rate Terms 3-month LIBOR + 4.85%  
Interest Rate 7.37% 6.23%
Maturity Date Jul. 30, 2035 Jul. 30, 2035
BST III [Member] | Junior Subordinated Debentures [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 6,755 $ 6,670
Initial Equity In Trust $ 310 [1] $ 310 [2]
BST III [Member] | Junior Subordinated Debentures [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Basis spread on rate   4.85%
BST IV [Member]    
Debt Instrument [Line Items]    
Issue Date Apr. 24, 2006 Apr. 24, 2006
Interest Rate Terms 3-month LIBOR+ 4.85%  
Interest Rate 7.65% 6.54%
Maturity Date Jun. 30, 2036 Jun. 30, 2036
BST IV [Member] | Junior Subordinated Debentures [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 9,933 $ 9,802
Initial Equity In Trust $ 464 [1] $ 464 [2]
BST IV [Member] | Junior Subordinated Debentures [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Basis spread on rate 4.85% 4.85%
BST V [Member]    
Debt Instrument [Line Items]    
Issue Date Jul. 21, 2006 Jul. 21, 2006
Interest Rate Terms 3-month LIBOR+ 4.85%  
Interest Rate 7.65% 6.54%
Maturity Date Sep. 30, 2036 Sep. 30, 2036
BST V [Member] | Junior Subordinated Debentures [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 9,933 $ 9,802
Initial Equity In Trust $ 464 [1] $ 464 [2]
BST V [Member] | Junior Subordinated Debentures [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Basis spread on rate 4.85% 4.85%
BST VI [Member]    
Debt Instrument [Line Items]    
Issue Date Feb. 26, 2007 Feb. 26, 2007
Interest Rate Terms 3-month LIBOR+ 4.80%  
Interest Rate 7.32% 6.18%
Maturity Date Apr. 30, 2037 Apr. 30, 2037
BST VI [Member] | Junior Subordinated Debentures [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 13,114 $ 12,935
Initial Equity In Trust $ 619 [1] $ 619 [2]
BST VI [Member] | Junior Subordinated Debentures [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Basis spread on rate 4.80% 4.80%
[1] TrustOutstandingAmount of Junior Subordinated Debentures (1)InitialEquity InTrust(2)IssueDateInterest RateInterestRate atDecember 31,2018MaturityDateBST I$ 14,900$ 6963/15/20053-month LIBOR+ 4.90%7.70%3/30/2035BST II 16,688 7745/4/20053-month LIBOR + 4.85% 7.37%7/30/2035BST III 6,755 3105/10/20053-month LIBOR + 4.85% 7.37%7/30/2035BST IV 9,933 4644/24/20063-month LIBOR+ 4.85%7.65%6/30/2036BST V 9,933 4647/21/20063-month LIBOR+ 4.85%7.65%9/30/2036BST VI 13,114 6192/26/20073-month LIBOR+ 4.80%7.32%4/30/2037$ 71,323$ 3,327Purchase accounting adjustment reduced the carrying value by $39.5 million.
[2] Purchase accounting adjustment reduced the carrying value by $40.4 million.