Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income		$ 63,908	$ 50,831
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		11,865	14,874
Operating lease cost		29,679
Share-based compensation		7,401	6,015
Other non-cash items		(634)	2,172
Changes in operating assets and liabilities:
Accounts receivable, net of allowances		(73,000)	(73,845)
Inventories		(9,955)	(6,506)
Prepaid expenses and other assets		(912)	(1,089)
Accounts payable, accrued expenses and other liabilities		26,548	48,409
Operating lease liabilities		(34,732)
Cash provided by operating activities		20,168	40,861
Cash flows from investing activities:
Purchases of property, equipment, and software		(18,722)	(3,246)
Proceeds from disposal of property and equipment		260	34
Cash used in investing activities		(18,462)	(3,212)
Cash flows from financing activities:
Proceeds from bank borrowings		95,000	0
Repayments of bank borrowings		0	(669)
Dividends—Series A convertible preferred stock	[1]	(2,985)	(6,000)
Repurchases of common stock		(108,475)	(25,946)
Other		(1,635)	(208)
Cash used in financing activities		(18,095)	(32,823)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash		410	(6,183)
Net change in cash, cash equivalents, and restricted cash		(15,979)	(1,357)
Cash, cash equivalents, and restricted cash—beginning of period		127,530	177,055
Cash, cash equivalents, and restricted cash—end of period		$ 111,551	$ 175,698

[1] Represents $3.0 million paid to induce conversion of Series A Convertible Preferred Stock to common stock for the six months ended June 30, 2019 and $6.0 million paid in Series A Convertible Preferred Stock cash dividends for the six months ended June 30, 2018.