Summary Quarterly Financial Data - Summary of Quarterly Financial Data (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Line Items]
Equity compensation expense					$ 37,515	$ 6,527	$ 2,349
Restructuring and other related costs related to severance costs and other employment expenses	$ 8,904
Loss on early extinguishment of debt and write-off of discounts and debt issuance costs				$ 20,348		20,905	$ 461
Long-term debt				$ 260,000
Severance costs		$ 112	$ 2,001			$ 2,001
2.25x Performance Restricted Shares [Member]
Quarterly Financial Information Disclosure [Line Items]
Equity compensation expense		$ 27,516			$ 27,516