Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net income	$ 21,569	$ 12,311
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	4,164	4,395
Debt discount amortization		2,725
Stock-based compensation	895	736
Deferred income taxes	(237)
(Gain) loss on disposal of property, plant and equipment	(67)	16
Changes in operating assets and liabilities:
Accounts receivable	(90,840)	(74,191)
Inventories	2,487	10,231
Prepaid expenses and other assets	850	210
Accounts payable	1,874	16
Accrued expenses and other liabilities	(7,004)	(1,951)
Income taxes receivable/payable	356	113
Net cash used in operating activities	(65,953)	(45,389)
Investing Activities
Expenditures for property, plant and equipment	(1,910)	(1,184)
Proceeds from sales of property, plant and equipment	67
Purchase of acquired company, net of cash acquired		(11)
Notes receivable, net	31	28
Net cash used in investing activities	(1,812)	(1,167)
Financing Activities
Financing costs	(73)	(729)
Restricted cash		12,000
Borrowings under line of credit	67,000	36,700
Repurchases of common stock	(1,996)	(1,522)
Proceeds from employee stock purchase and option plans	2,577	412
Net cash provided by financing activities	67,508	46,861
Net increase (decrease) in cash and cash equivalents	(257)	305
Cash and cash equivalents at beginning of period	2,159	4,526
Cash and cash equivalents at end of period	1,902	4,831
Supplemental Disclosure:
Cash paid for interest, net of capitalized interest	96	2,795
Cash paid for income taxes, net	$ 79	$ 6