Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 139,909	$ 95,439
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,767	6,766
Amortization of debt issuance costs	247	91
Stock-based compensation	2,976	3,051
(Gain) loss on disposal of fixed assets	562	(2)
Deferred income taxes	2,286	3,061
Provision for legal settlement	0	(32,000)
Payment of legal settlement	0	(32,000)
Effect of changes in operating assets and liabilities:
Receivables	(35,324)	(12,282)
Inventories	(6,850)	8,257
Prepaid expenses and other assets	(1,849)	(2,066)
Accounts payable	20,812	4,055
Other liabilities	(9,292)	5,158
Net cash provided by operating activities	121,244	111,528
Cash flows from investing activities:
Capital expenditures	(71,665)	(17,901)
Restricted Cash	0	308
Proceeds from Sale of Productive Assets	0	15
Net cash used in investing activities	(71,665)	(18,194)
Cash flows from financing activities:
Proceeds from borrowings of new debt	400,000	0
Repayment of long-term debt	(382,147)	0
Payments related to long-term refinancing	(4,382)	0
Principal payments on long-term debt	(1,990)	(2,970)
Repurchases of Common Stock	50,000	0
Net cash used in financing activities	4,527	1,805
Net cash provided by (used in) financing activities	(33,992)	(1,165)
Effect of exchange rate changes on cash and cash equivalents	139	(60)
Net increase in cash and cash equivalents	15,726	92,109
Cash and cash equivalents at beginning of period	292,656	224,253
Cash and cash equivalents at end of period	308,382	316,362
Supplemental schedule of non-cash investing activities
Accruals related to property, plant and equipment	$ 17,125	$ 0