Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 10,400	$ 24,046
Loss from discontinued operations		76
Income from continuing operations	10,400	24,122
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization	17,279	15,225
(Gain) loss on sale of fixed assets	(360)	154
Equity-based compensation expense	4,007	3,720
Deferred income taxes	(1,548)	(490)
Equity in earnings of affiliated companies	(1,615)	(2,677)
Gain on foreign currency	(2,010)
Changes in operating assets and liabilities (net of CRTS acquisition):
Restricted cash	600	601
Return on equity method investments	4,722	3,046
Receivables net, retainage and costs and estimated earnings in excess of billings	(3,441)	(26,173)
Inventories	(999)	(6,846)
Prepaid expenses and other assets	(1,223)	(1,322)
Accounts payable and accrued expenses	(17,662)	3,574
Other	(2,678)	221
Net cash provided by operating activities of continuing operations	5,472	13,155
Net cash used in operating activities of discontinued operations		(699)
Net cash provided by operating activities	5,472	12,456
Cash flows from investing activities:
Capital expenditures	(11,004)	(19,821)
Proceeds from sale of fixed assets	599	301
Patent expenditures	(700)	(1,003)
Purchase of Singapore licensee		(1,257)
Purchase of CRTS, net of cash acquired	(23,639)
Net cash used in investing activities	(34,744)	(21,780)
Cash flows from financing activities:
Proceeds from issuance of common stock, including tax benefit of stock option exercises	3,303	1,996
Proceeds from notes payable	35
Principal payments on notes payable	(1,564)	(1,774)
Investments from noncontrolling interests	141	1,681
Distributions/dividends to noncontrolling interests	(1,729)
Proceeds from line of credit	25,000
Debt amendment costs	(173)
Principal payments on long-term debt	(5,000)	(5,000)
Net cash provided by (used in) financing activities	20,013	(3,097)
Effect of exchange rate changes on cash	2,434	(3,502)
Net decrease in cash and cash equivalents for the period	(6,825)	(15,923)
Cash and cash equivalents, beginning of period	114,829	106,064
Cash and cash equivalents, end of period	$ 108,004	$ 90,141