Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (28,268)	$ (12,104)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion	17,850	14,666
Change in fair value of contingent consideration	1,117	6,223
(Recovery of) provision for doubtful accounts, net	(301)	479
Stock compensation	6,406	8,957
Other	(254)	295
Changes in operating assets and liabilities:
Trade accounts receivable	81,180	69,714
Inventories	(60,689)	(92,987)
Prepaid expenses and other current assets	4,435	25,307
Income tax receivable	(18,673)	(16,858)
Other assets	(1,311)	(2,768)
Trade accounts payable	39,434	80,919
Contingent consideration	(6,458)	(959)
Accrued expenses	(9,692)	(25,379)
Income taxes payable	(23,384)	(25,694)
Long-term liabilities	1,186	757
Net cash provided by operating activities	2,578	30,568
Cash flows from investing activities:
Purchases of property and equipment	(28,818)	(25,951)
Equity method investment		(2,000)
Purchases of intangible assets	(847)
Net cash used in investing activities	(29,665)	(27,951)
Cash flows from financing activities:
Cash paid for shares withheld for taxes	(3,395)	(4,725)
Excess tax benefits from stock compensation	492	1,795
Cash paid for repurchases of common stock		(100,000)
Contingent consideration and deferred payments paid	(22,628)	(29,041)
Cash paid for noncontrolling interest in consolidated entity		(20,000)
Proceeds from issuance of short-term borrowing	36,000
Cash paid for repayment of short-term borrowings	(43,000)
Net cash used in financing activities	(32,531)	(151,971)
Effect of exchange rates on cash	(1,503)	149
Net change in cash and cash equivalents	(61,121)	(149,205)
Cash and cash equivalents at beginning of period	110,247	263,606
Cash and cash equivalents at end of period	49,126	114,401
Cash paid during the period for:
Income taxes	29,454	35,916
Interest	426	47
Non-cash investing activity:
Accruals for purchases of property and equipment	4,111	1,034
Accruals for asset retirement obligations	23	62
Non-cash financing activity:
Accruals for shares withheld for taxes	$ 1,391	$ 1,014