Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities
Net income (loss)	$ 17,673	$ (24,048)
Adjustments to reconcile net loss to cash flow from operating activities
Depreciation and amortization	9,358	12,573
Provision for excess and obsolete inventory	818	467
Stock-based compensation	992	933
Loss on extinguishment of debt		15,528
Gain on sale of assets	(5,945)
Other	118	1,457
Increase (decrease) in cash from operating assets and liabilities
Accounts receivable	(2,009)	4,258
Inventory	525	(474)
Other current assets	393	(368)
Accounts payable	1,474	108
Accrued expenses and other liabilities	(1,982)	(6,715)
Cash provided by operating activities	21,415	3,719
Cash flows from investing activities
Proceeds from sale of assets	9,000
Capital expenditures	(2,388)	(6,112)
Redemption of certificate of deposit-restricted	74
Cash provided by (used in) investing activities	6,686	(6,112)
Cash flows from financing activities
Proceeds from issuance of common stock in initial public offering		73,539
Payments for initial public offering costs		(5,255)
Proceeds from issuance of long-term debt		360,438
Payments on long-term debt	(1,861)
Payments on senior notes		(400,000)
Payment for call premium on senior notes		(9,752)
Payments on line of credit		(8,000)
Payments for offering costs		(563)
Payments on note payable		(37)
Deferred financing costs	(11)	(5,315)
Cash (used in) provided by financing activities	(1,872)	5,055
Effect of foreign exchange rate on cash	26	(201)
Increase in cash and cash equivalents	26,255	2,461
Cash and cash equivalents, beginning of period	28,596	19,739
Cash and cash equivalents, end of period	54,851	22,200
Supplemental disclosure of cash flow information
Interest paid	12,790	27,741
Income taxes paid	$ 273	$ 73