Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 32,970	$ 25,683
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,815	17,031
Unrealized gains on foreign exchange, net	(1,744)	(4,884)
Share-based compensation	3,945	5,898
Other non-cash items	(2,872)	1,685
Changes in operating assets and liabilities:
Accounts receivable, net of allowances	(53,086)	(47,129)
Inventories	(4,743)	2,148
Prepaid expenses and other assets	12,567	(5,107)
Accounts payable, accrued expenses and other liabilities	35,528	24,493
Cash provided by operating activities		19,818
Cash flows from investing activities:
Cash paid for purchases of property and equipment	(4,958)	(10,280)
Proceeds from disposal of property and equipment	1,506	2,428
Cash paid for intangible assets	(7,273)	(2,561)
Change in restricted cash	30	(845)
Cash used in investing activities		(11,258)
Cash flows from financing activities:
Proceeds from bank borrowings	5,500	29,582
Repayments of bank borrowings and capital lease obligations	(7,565)	(30,662)
Dividends—Series A preferred stock	(6,000)	(6,000)
Repurchases of common stock		0
Other	(240)	(363)
Cash used in financing activities		(7,443)
Effect of exchange rate changes on cash	(983)	2,204
Net change in cash and cash equivalents		3,321
Cash and cash equivalents—beginning of period	147,565	143,341
Cash and cash equivalents—end of period	$ 156,962	$ 146,662