Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Cash flows from operating activities:
Net income (loss)	$ (83,196)	$ (4,926)	$ 10,420
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	35,993	37,413	41,506
Unrealized (gain) loss on foreign exchange, net	(814)	(11,100)	(6,420)
Deferred income taxes	289	829	23,536
Asset impairment charges	15,306	8,827	10,949
Provision for doubtful accounts, net	25,997	12,087	1,930
Share-based compensation	11,236	12,503	11,871
Inventory write-down charges	3,108	7,490	3,419
Non-cash restructuring charges		6,413
Other non-cash items	4,029	534	1,193
Changes in operating assets and liabilities:
Accounts receivable, net of allowances	(15,604)	(15,288)	(17,166)
Inventories	(8,586)	(31,251)	(5,274)
Prepaid expenses and other assets	1,755	21,698	(4,225)
Accounts payable	23,260	(12,106)	(5,740)
Accrued expenses and other liabilities	8,765	(15,824)	14,256
Accrued restructuring	(3,677)	4,859
Income taxes	(8,163)	(33,809)	3,209
Cash provided by (used in) operating activities	9,698	(11,651)	83,464
Cash flows from investing activities:
Cash paid for purchases of property and equipment	(12,826)	(15,991)	(40,424)
Proceeds from disposal of property and equipment	(2)	236	250
Cash paid for intangible assets	(5,660)	(41,035)	(28,404)
Change in restricted cash	(139)	(1,202)	(1,180)
Cash used in investing activities	(18,627)	(57,992)	(69,758)
Cash flows from financing activities:
Proceeds from preferred stock offering, net of issuance costs of $0.0 million and $15.8 million, respectively		182,220
Dividends - Series A preferred stock	(11,900)	(8,234)
Proceeds from bank borrowings			23,375
Repayment of bank borrowings and capital lease obligations	(5,290)	(5,177)	(13,160)
Deferred debt issuance costs	191	(75)	(100)
Deferred offering costs			(767)
Issuances of common stock	1,864	1,342	2,280
Purchase of treasury stock, net of issuances	(85,926)	(145,858)	(12,533)
Repurchase of common stock for tax withholding	(261)	(787)	(256)
Excess tax benefit from share-based compensation	62
Cash provided by (used in) financing activities	(101,260)	23,431	(1,161)
Effect of exchange rate changes on cash	(13,982)	(3,420)	10,251
Net increase (decrease) in cash and cash equivalents	(124,171)	(49,632)	22,796
Cash and cash equivalents - beginning of period	267,512	317,144	294,348
Cash and cash equivalents - end of period	143,341	267,512	317,144
Supplemental disclosure of cash flow information-cash paid during the period for:
Interest, net of capitalized interest	917	616	693
Income taxes	19,923	33,655	20,274
Supplemental disclosure of non-cash investing and financing activities:
Assets acquired under capitalized leases	20		61
Accrued purchases of property and equipment	851	771	2,165
Accrued purchases of intangibles		2,988	$ 4,742
Intrinsic value of beneficial conversion feature - Series A preferred stock		12,276
Accrued dividends	3,000	3,067
Accretion of dividend equivalents	2,978	$ 2,735
Change in assets held for sale	$ 1,595