Goodwill and Other Intangible Assets-Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 4,204	$ 4,204
Amortization of intangible assets related to the 2007 Transactions [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	3,912	3,912
Amortization related to intangible assets existing prior to the 2007 Transactions [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 292	$ 292