Summary of Significant Accounting Policies (Correction of Immaterial Error and Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net revenue	$ 92,861	$ 101,950	$ 101,511	$ 96,978	$ 92,233	$ 99,231	$ 98,916	$ 95,522	$ 393,300	$ 385,902	$ 389,774
Operating Expenses									$ 378,479	363,966	360,775
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net revenue										387,991	390,488
Operating Expenses										366,055	361,489
Correction
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net revenue			$ 300	$ 300			$ 700	$ 1,000		(2,089)	(714)
Operating Expenses										$ (2,089)	$ (714)