Income Taxes Income Tax Reconciliation of Effective Tax Rate (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Effective Tax Rate [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 24,407	$ 14,467	$ 4,466
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	2,199	534	829
Unrecognized Tax Benefits, Period Increase (Decrease)	0	0	(1,346)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(9,291)	(126,458)	(5,076)
Income Tax Reconciliation, Change in State NOL Deferred Tax Asset – Net of Federal Tax Benefit	1,780	853	(312)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(148)	516	851
Income Tax Expense (Benefit)	$ 18,947	$ (110,088)	$ (588)