Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortization of Intangible Assets	$ 1,000		$ 900	$ 1,600		$ 1,800
Cash collateral	4,200			4,200
Warrant [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset (Liability)	(13,832)			(13,832)			$ (12,123)
Contingent Consideration Liability [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset (Liability)	(23,555)			(23,555)			(9,131)
Embedded Derivative [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset (Liability)	589			589			1,015
Embedded Derivative [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset (Liability)	(1,229)	[1]		(1,229)	[1]		1,015
Options Collar [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset (Liability)	617			617			0
Swap [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset (Liability)	$ 1,201			$ 1,201			$ 0

[1] Does not include cash collateral of $4.2 million recorded in Prepaid and other current assets as of June 30, 2015.