Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 34,599	$ 24,150
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,701	25,473
Unrealized foreign currency gain (loss), net	1,017	(7,863)
Share-based compensation	6,851	8,006
Other non-cash items	(1,208)	3,669
Changes in operating assets and liabilities:
Accounts receivable, net of allowances	(9,068)	(15,762)
Inventories	12,435	3,750
Prepaid expenses and other assets	12,997	(7,559)
Accounts payable, accrued expenses and other liabilities	(1,909)	(4,510)
Cash provided by operating activities	80,415	29,354
Cash flows from investing activities:
Cash paid for purchases of property and equipment	(6,553)	(12,651)
Proceeds from disposal of property and equipment	1,562	2,425
Cash paid for intangible assets	(7,710)	(5,598)
Change in restricted cash	383	953
Cash used in investing activities	(12,318)	(14,871)
Cash flows from financing activities:
Proceeds from bank borrowings	5,500	29,582
Repayments of bank borrowings and capital lease obligations	(8,222)	(32,378)
Dividends—Series A preferred stock	(9,000)	(9,000)
Repurchases of common stock	(25,645)	0
Other	(233)	(338)
Cash used in financing activities	(37,600)	(12,134)
Effect of exchange rate changes on cash	127	4,526
Net change in cash and cash equivalents	30,624	6,875
Cash and cash equivalents—beginning of period	147,565	143,341
Cash and cash equivalents—end of period	$ 178,189	$ 150,216