Income Taxes Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	$ 30,117	$ 40,870	$ 46,066
Income Tax Reconciliation, State and Local Income Taxes	1,135	4,022	2,737
Income Tax Reconciliation, Tax Exempt Income	(7)	(6)	(7)
Income Tax Reconciliation, Tax Contingencies	(1,473)	(1,006)	(993)
Income Tax Reconciliation, Other Adjustments	(109)	(165)	(1,020)
Income Tax Expense (Benefit)	$ 29,663	$ 43,715	$ 46,783