Business Combinations - Narrative - Unaudited Pro Forma Supplemental Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 17, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Acquisition-related costs	$ 0	$ 11,232,000	$ 9,478,000
Loss on debt extinguishment	0	(10,449,000)	0
Income tax expense (benefit)	11,538,000	7,065,000	(153,159,000)
2023 Senior Notes
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Interest rate (percent)				7.875%
CBR
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Acquisition-related costs		11,200,000
Loss on debt extinguishment		(10,400,000)
Other one-time fees and expenses		$ 9,200,000
CBR | 2023 Senior Notes
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Principal amount of debt at time of issuance	$ 500,000,000
CBR | 2023 Senior Notes | Private Placement
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Principal amount of debt at time of issuance				$ 500,000,000.0
Lumara Health
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Acquisition-related costs			9,500,000
Income tax expense (benefit)			$ (153,200,000)