Annual report pursuant to Section 13 and 15(d)

Income Taxes (Reasons For The Difference Between Provision For Income Taxes) (Details)

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Income Taxes (Reasons For The Difference Between Provision For Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]      
Income tax expense at statutory rate $ 9,868 $ 24,466 $ 43,484
Effect of state taxes, net of federal tax benefit 1,992 3,837 2,735
Effect of federal rate change, net of federal tax benefit   (1,005) (47,722)
Effect of state rate changes on net deferred liabilities (755) 833 156
Change in valuation allowance 255 (283) 275
Non-deductible items 1,258 1,182 460
Tax credits (478) (489) (1,733)
Income Tax Expense (Benefit), Total $ 12,140 $ 28,541 $ (2,345)