Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net loss	$ (2,809)	$ (8,537)	$ (28,812)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	20,923	22,878	22,822
Amortization of debt costs	596	726	720
Amortization of exclusivity agreements	1,156	1,929	1,546
Provision for doubtful accounts	3,431	938	4,590
Deferred income taxes	(1,156)	(7,053)	2,829
Share-based compensation	7,214	5,724	6,267
Impairment of goodwill and certain assets		966	19,193
Gain on sale of assets	(3,099)
Excess income tax benefit on employee stock-based awards	(386)	(206)	(82)
Interest accrual on debt securities	(1,006)
Other	2,854	821	4,536
Changes in operating assets and liabilities, net of effect of dispositions:
Trade accounts receivable	(1,547)	6,138	28,562
Inventories	3,136	8,109	(3,213)
Prepaid expenses and other current assets	8,697	5,100	8,764
Other long-term assets	(315)	(734)	(5,329)
Trade accounts payable	3,011	(6,451)	(2,280)
Other current liabilities	1,515	5,456	6,969
Other long-term liabilities	1,009	15,154	(40)
Net cash provided by operating activities	43,224	50,958	67,042
Cash flows from investing activities:
Capital expenditures for property, plant and equipment	(27,197)	(18,069)	(24,787)
Capital expenditures for intangible assets	(702)	(456)	(4,891)
Purchase of other investments		(1,457)	(1,374)
Purchase of debt securities	(15,250)
Proceeds from sale of assets	4,800	32
Net cash used in investing activities	(38,349)	(19,950)	(31,052)
Cash flows from financing activities:
Net proceeds from issuance of common shares	3,704	10,462	3,450
Repayments of long-term debt		(20,000)	(16)
Payment of debt issuance costs	(1,825)
Changes in restricted cash	34,424	(10,662)	(2,375)
Repurchase and retirement of common shares	(11,575)		(39,494)
Excess income tax benefit on employee stock-based awards	386	206	82
Net cash provided by (used in) financing activities	25,114	(19,994)	(38,353)
Effect of exchange rate changes on cash	(3,141)	(3,123)	520
Net increase (decrease) in cash and cash equivalents	26,848	7,891	(1,843)
Cash and cash equivalents at the beginning of the year	36,815	28,924	30,767
Cash and cash equivalents at the end of the year	63,663	36,815	28,924
Cash paid during the year for:
Interest	852	1,315	2,046
Income taxes	$ 3,160	$ 2,222	$ 8,773