Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 16,454	$ 11,010
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	7,643	8,446
Unrealized foreign currency (gain) loss, net	(787)	856
Share-based compensation	2,674	2,611
Other non-cash items	941	(689)
Changes in operating assets and liabilities:
Accounts receivable, net of allowances	(86,850)	(66,917)
Inventories	(20,853)	(28,591)
Prepaid expenses and other assets	5,112	9,618
Accounts payable, accrued expenses and other liabilities	29,065	13,766
Cash used in operating activities	(46,601)	(49,890)
Cash flows from investing activities:
Purchases of property, equipment, and software	(1,668)	(5,410)
Proceeds from disposal of property and equipment	16	12
Cash used in investing activities	(1,652)	(5,398)
Cash flows from financing activities:
Proceeds from bank borrowings	0	5,500
Repayments of bank borrowings and capital lease obligations	(400)	(3,376)
Dividends—Series A preferred stock	(3,000)	(3,000)
Repurchases of common stock	(20,061)	0
Other	(692)	(240)
Cash used in financing activities	(24,153)	(1,116)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	2,176	(1,389)
Net change in cash, cash equivalents, and restricted cash	(70,230)	(57,793)
Cash, cash equivalents, and restricted cash—beginning of period	177,055	152,646
Cash, cash equivalents, and restricted cash—end of period	$ 106,825	$ 94,853