Consolidated Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities:
Net income	$ 33,002	$ 15,437
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	15,931	15,730
Deferred tax provision	(6,309)	(1,414)
Stock compensation	2,225	998
Defined benefit plan (income) expense	28	(105)
Provision of doubtful accounts	(330)	(8)
Gain on revaluation of financial derivatives	(217)	(1,878)
Gain on equity investment		(197)
(Gain) loss on sale of property, plant and equipment	28	(16)
Gain realized from step acquisition of subsidiary	(785)
Changes in operating assets and liabilities:
Accounts receivable	(17,456)	(12,028)
Inventory	5,024	(2,835)
Prepaid expenses and other assets	(6,959)	(4,091)
Accounts payable	(1,312)	14,470
Accrued liabilities	1,496	2,372
Net cash provided by operating activities	24,366	26,435
Investing Activities:
Purchase of non-controlling interest		(46,827)
Acquisition and investment in subsidiary, net of cash acquired	(31,739)
Proceeds from the sale of property, plant and equipment	44	9
Purchase of property and equipment	(15,489)	(18,032)
Net cash used in investing activities	(47,184)	(64,850)
Financing Activities:
Borrowing of debt	13,455	46,280
Repayments of debt	(12,470)	(10,286)
Excess tax benefit from equity awards	4,155	204
Cash paid to Series C Preferred Stock Holders		(8,945)
Proceeds from the exercise of common stock options	3,406	2,411
Net cash provided by financing activities	8,546	29,664
Foreign currency effect	2,541
Net decrease in cash and cash equivalents	(11,731)	(8,751)
Cash and cash equivalents at beginning of period	54,885	58,152
Cash and cash equivalents at end of period	43,154	49,401
Supplemental disclosure of cash flow information:
Cash paid for taxes	9,889	3,360
Cash paid for interest	1,308	1,368
Supplemental disclosure of non-cash transactions:
Common stock issued to Board of Directors and employees	1,330	374
Issuance of common stock to non-controlling interest		42,517
Issuance of common stock for Series C Preferred Stock conversion		$ 8,276