Income Taxes Income Tax Expense Detail (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Current Federal Tax Expense (Benefit)	$ 33,364	$ 6,860	$ 30,560
Current State and Local Tax Expense (Benefit)	2,703	855	1,152
Current Income Tax Expense (Benefit)	36,067	7,715	31,712
Deferred Federal Income Tax Expense (Benefit)	5,170	36,706	7,192
Deferred State and Local Income Tax Expense (Benefit)	2,478	2,362	3,070
Deferred Income Tax Expense (Benefit)	7,648	39,068	10,262
Income Tax Expense (Benefit)	$ 43,715	$ 46,783	$ 41,974