Income Taxes Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	$ 40,870	$ 46,066	$ 39,395
Income Tax Reconciliation, State and Local Income Taxes	4,022	2,737	3,242
Income Tax Reconciliation, Tax Exempt Income	(6)	(7)	(20)
Income Tax Reconciliation, Tax Contingencies	(1,006)	(993)	(766)
Income Tax Reconciliation, Other Adjustments	(165)	(1,020)	123
Income Tax Expense (Benefit)	$ 43,715	$ 46,783	$ 41,974