Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 4,428	$ 3,337
Loss from discontinued operations	132	921
Income from continuing operations	4,560	4,258
Adjustments to reconcile to net cash (used in) provided by operating activities:
Depreciation and amortization	10,849	9,100
Loss (gain) on sale of fixed assets	160	(264)
Equity-based compensation expense	1,284	1,835
Deferred income taxes	553	367
Equity in earnings of affiliated companies	(677)	(902)
Loss on sale of interests in Bayou Coating, L.L.C.	472	0
(Gain) loss on foreign currency transactions	(366)	129
Other	631	(747)
Changes in operating assets and liabilities (net of acquisitions):
Restricted cash	(130)	(73)
Return on equity of affiliated companies	684	0
Receivables net, retainage and costs and estimated earnings in excess of billings	(9,005)	19,380
Inventories	(340)	(874)
Prepaid expenses and other assets	829	(912)
Accounts payable and accrued expenses	(17,652)	(25,996)
Other operating	(781)	1,381
Net cash (used in) provided by operating activities of continuing operations	(8,929)	6,682
Net cash used in operating activities of discontinued operations	0	(3,091)
Net cash (used in) provided by operating activities	(8,929)	3,591
Cash flows from investing activities:
Capital expenditures	(5,620)	(4,988)
Proceeds from sale of fixed assets	380	709
Patent expenditures	(677)	(211)
Sale of interests in Bayou Coating, L.L.C.	9,065	0
Net cash provided by (used in) investing activities	3,148	(4,490)
Cash flows from financing activities:
Proceeds from issuance of common stock upon stock option exercises, including tax effects	1,287	638
Repurchase of common stock	(5,475)	(4,582)
Purchase of noncontrolling interest	(617)	0
Proceeds on notes payable	0	1,359
Principal payments on long-term debt	(4,539)	(6,250)
Net cash provided by financing activities	(9,344)	(8,835)
Effect of exchange rate changes on cash	818	(4,985)
Net decrease in cash and cash equivalents for the period	(14,307)	(14,719)
Cash and cash equivalents, beginning of period	158,045	133,676
Cash and cash equivalents, end of period	$ 143,738	$ 118,957