Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2006	Apr. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Distribution fee	$ 100,000
Distribution agreement period	10 years
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2017		$ 52,911
2018		51,568
2019		49,597
2020		38,040
2021		$ 35,107