Consolidated Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating Activities:
Net income	$ 24,202	$ 18,615
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	23,467	22,737
Deferred tax provision	(1,138)	2,134
Stock compensation	1,861	911
Defined benefit plan expense	(159)	(303)
Provision of doubtful accounts	369	(305)
Gain on revaluation of financial derivatives	(2,859)	(1,064)
Loss (gain) on equity investment	(318)	228
Loss on sale of property, plant and equipment	48	53
Excess tax benefit from equity awards	(1,317)	(1,577)
Changes in operating assets and liabilities:
Accounts receivable	(19,606)	(16,728)
Inventory	(8,824)	(4,250)
Prepaid expenses and other assets	(2,458)	(7,264)
Accounts payable	11,250	4,622
Accrued liabilities	4,099	10,715
Net cash provided by operating activities	28,617	28,524
Investing Activities:
Purchase of non-controlling interest	(46,835)
Purchase of derivative financial instruments		(7,787)
Proceeds from the sale of property, plant and equipment	7	20
Purchase of property and equipment	(30,016)	(15,344)
Loan to equity investment		(590)
Cash invested in corporate owned life insurance	(266)	(265)
Patent costs		(1,744)
Net cash used in investing activities	(77,110)	(25,710)
Financing Activities:
Borrowing of debt	48,923	3,286
Repayments of debt	(18,966)	(19,149)
Distributions paid to non-controlling interests	(3)	(290)
Proceeds from public offering of common stock		75,487
Excess tax benefit from equity awards	1,317	1,577
Cash paid to Series C Preferred Stock Holders	(9,142)	(17,340)
Proceeds from the exercise of Common Stock options	2,901	733
Net cash provided by financing activities	25,030	46,225
Foreign currency effect	1,314	(599)
Net increase (decrease) in cash and cash equivalents	(22,149)	48,440
Cash and cash equivalents at beginning of period	58,152	23,839
Cash and cash equivalents at end of period	36,003	72,279
Supplemental disclosure of cash flow information:
Cash paid for taxes	7,174	5,678
Cash paid for interest	2,249	2,787
Supplemental disclosure of non-cash transactions:
Common stock issued to Board of Directors and employees	1,028	314
Issuance of common stock to non-controlling interest	42,517
Issuance of common stock for Series C Preferred Stock conversion	15,508
W.E.T.
Financing Activities:
Proceeds from sale of W.E.T. equity to non-controlling interest		$ 1,921