Business Combination - Activity - CBR (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Aug. 17, 2015	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill		$ 639,188	$ 639,188	$ 205,824
Measurement period adjustments
Increase in goodwill due to measurement period adjustments			(7,711)
Other disclosures
Net deferred tax liability		189,145	189,145	77,619
Acquisition-related costs			11,232	$ 9,478	$ 782
CBR Acquisition Holdings Corp
Business Acquisition [Line Items]
Cash consideration	$ 700,000
Estimated working capital and other adjustments	(17,837)
Purchase price paid at closing	682,163
Cash paid on finalization of net working capital, indebtedness and other adjustments	193
Total purchase price	682,356
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Accounts receivable	8,660
Inventories	3,825
Prepaid and other current assets	8,360
Restricted cash - short-term	30,752
Property, plant and equipment	29,401
Deferred income tax assets	5,155
Other long-term assets	198
Accounts payable	(2,853)
Accrued expenses	(13,798)
Deferred revenues - short-term	(3,100)
Payable to former CBR shareholders	(37,947)
Deferred income tax liabilities	(149,530)
Other long-term liabilities	(200)
Total estimated identifiable net assets	241,281
Goodwill	441,075	441,100	441,100
Total	682,356
Measurement period adjustments
Measurement period adjustments, decrease in assets		1,900
Measurement period adjustments, increase in liabilities		500
Increase in goodwill due to measurement period adjustments		1,800
Measurement period adjustments, deferred taxes		600
Other disclosures
Contractual amount of accounts receivable	11,700
Contractual amount of accounts receivable expected to be collectible	8,700
Net deferred tax liability		$ 144,300	$ 144,300
Combined federal and state statutory income tax rate (as a percent)			37.00%
Acquisition-related costs			$ 11,200
Revenue generated after the acquisition date			$ 24,100
CBR Acquisition Holdings Corp | CBR Customer Relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Finite-lived intangible assets	$ 297,000
Other disclosures
Useful life	20 years		20 years
CBR Acquisition Holdings Corp | Favorable Lease
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Finite-lived intangible assets	$ 358
CBR Acquisition Holdings Corp | Other Income (expense)
Other disclosures
Bridge loan, commitment fee	6,800
CBR Trade Names and Trademarks | CBR Acquisition Holdings Corp
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Indefinite-lived intangible assets	$ 65,000