CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OPERATING ACTIVITIES:
Consolidated net income	$ 52,362	$ 35,378	$ 43,013
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	14,476	11,455	5,246
Amortization of deferred financing fees	842	782	1,948
Amortization of unfavorable contract liability	(1,905)	(635)	0
Non-cash stock compensation expense	7,050	7,032	5,159
Non-cash interest expense	4,634	6,436	2,109
Non-cash gain on bargain purchase	(3,707)	0	0
Non-cash settlement of product warranty liability	(1,299)	0	0
Deferred tax assets, net	2,091	67	(4,411)
Excess tax benefit from stock compensation	(2,928)	(4,488)	0
Equity in earnings of unconsolidated joint venture	(80)	0	(14,550)
Changes in operating assets and liabilities:
Trade accounts receivable	(14,277)	(23,856)	(13,581)
Inventories	(3,797)	(15,447)	(9,307)
Prepaid expenses and other current assets	(648)	(5,689)	(183)
Trade accounts payable	1,975	4,489	2,546
Accrued expenses and other liabilities	2,537	10,720	1,668
NET CASH PROVIDED BY OPERATING ACTIVITIES	57,326	26,244	19,657
INVESTING ACTIVITIES:
Payments for acquisitions and equity investments	(55,482)	(55,047)	(87,412)
Purchases of property, plant and equipment	(11,642)	(20,454)	(11,503)
Distributions from unconsolidated joint venture	250	0	3,881
NET CASH USED IN INVESTING ACTIVITIES	(66,874)	(75,501)	(95,034)
FINANCING ACTIVITIES:
Proceeds from issuance of convertible notes	0	0	120,000
Debt financing costs	(3,032)	0	(5,098)
Net proceeds from common stock offering and warrant exercises	0	0	1,727
Excess tax benefit from stock compensation	2,928	4,488	0
Proceeds under stock option and stock purchase plans	3,222	1,878	1,087
NET CASH PROVIDED BY FINANCING ACTIVITIES	3,118	6,366	117,716
Effect of changes in exchange rates on cash and cash equivalents	(173)	(290)	0
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(6,603)	(43,181)	42,339
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	40,781	83,962	41,623
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 34,178	$ 40,781	$ 83,962