Income Taxes Income Tax Reconciliation of Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Effective Tax Rate [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 30,425	$ 24,407	$ 14,467
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	2,820	2,199	534
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	0	9,291	(126,458)
Income Tax Reconciliation, Change in State NOL Deferred Tax Asset – Net of Federal Tax Benefit	1,548	1,780	853
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	373	(148)	516
Provision (benefit) from income taxes	$ 35,166	$ 18,947	$ (110,088)