Consolidated Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating Activities:
Net income	$ 50,290	$ 24,202
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	24,565	23,467
Deferred tax provision	(6,294)	(2,455)
Stock compensation	3,449	1,861
Defined benefit plan income	(33)	(159)
Provision of doubtful accounts	500	369
Gain on revaluation of financial derivatives	(1,264)	(2,859)
Gain on equity investment		(318)
Loss on sale of property and equipment	202	48
Unrealized foreign currency gain	(467)
Gain realized from step acquisition of subsidiary	(785)
Changes in operating assets and liabilities:
Accounts receivable	(25,190)	(19,606)
Inventory	(4,000)	(8,824)
Prepaid expenses and other assets	(8,240)	(2,458)
Accounts payable	8,039	11,250
Accrued liabilities	4,679	4,099
Net cash provided by operating activities	45,451	28,617
Investing Activities:
Purchase of non-controlling interest		(46,835)
Acquisition and investment in subsidiary, net of cash acquired	(31,739)
Proceeds from the sale of property and equipment	96	7
Purchase of property and equipment	(26,990)	(30,016)
Cash invested in corporate owned life insurance		(266)
Net cash used in investing activities	(58,633)	(77,110)
Financing Activities:
Borrowing of debt	91,592	48,923
Repayments of debt	(76,904)	(18,966)
Distribution paid to non-controlling interests		(3)
Excess tax benefit from equity awards	4,004	1,317
Cash paid to Series C Preferred Stock Holders		(9,142)
Proceeds from the exercise of common stock options	6,282	2,901
Net cash provided by financing activities	24,974	25,030
Foreign currency effect	(1,508)	1,314
Net increase (decrease) in cash and cash equivalents	10,284	(22,149)
Cash and cash equivalents at beginning of period	54,885	58,152
Cash and cash equivalents at end of period	65,169	36,003
Supplemental disclosure of cash flow information:
Cash paid for taxes	13,181	7,174
Cash paid for interest	1,990	2,249
Supplemental disclosure of non-cash transactions:
Common stock issued to Board of Directors and employees	2,026	1,028
Issuance of common stock to non-controlling interest		42,517
Issuance of common stock for Series C Preferred Stock conversion		$ 15,108