CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 12,441	$ 5,255	$ 8,605
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation (including capital lease amortization)	5,492	5,383	5,042
Amortization of purchased intangible assets	5,707	5,330	5,064
Amortization of deferred debt issuance costs	649	587	297
Stock-based compensation	3,397	3,501	3,425
Deferred income tax benefit	(1,587)	(1,708)	(2,784)
Equity in earnings of joint ventures		(255)	(221)
Gain on step acquisition of joint ventures		(2,117)
Loss on disposal of property, plant and equipment	35	34
Change in:
Accounts receivable, net	(9,551)	2,690	11,891
Inventories	(8,392)	1,696	6,604
Prepaid expenses and other	(1,346)	(437)	(571)
Accounts payable	(1,035)	2,970	(8,045)
Customer advances	465	(4,871)	3,813
Accrued expenses and other liabilities	3,451	(1,365)	(3,580)
Net cash provided by operating activities	9,726	16,693	29,540
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(7,726)	(3,527)	(3,917)
Acquisition of Austin Explosives Company		(3,620)
Step acquisition of joint ventures, net of cash acquired		(2,065)
Acquisition of LRI, net of cash acquired			(284)
Change in other non-current assets	(5)	(53)	59
Net cash used in investing activities	(7,731)	(9,265)	(4,142)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment on syndicated term loans	(22,247)	(22,124)	(13,614)
Borrowings (repayments) on bank lines of credit, net	24,191	780	(952)
Payment on loans with former owners of LRI	(36)		(1,231)
Payment on Nord LB term loans	(627)	(797)	(876)
Payment on capital lease obligations	(295)	(304)	(203)
Payment of dividends	(2,130)	(2,089)	(1,028)
Payment of deferred debt issuance costs	(435)		(341)
Contribution from non-controlling stockholder	42
Net proceeds from issuance of common stock to employees and directors	177	188	425
Tax impact of stock-based compensation	(35)	(601)	90
Net cash used in financing activities	(1,395)	(24,947)	(17,730)
EFFECTS OF EXCHANGE RATES ON CASH	104	(320)	383
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	704	(17,839)	8,051
CASH AND CASH EQUIVALENTS, beginning of the period	4,572	22,411	14,360
CASH AND CASH EQUIVALENTS, end of the period	5,276	4,572	22,411
Cash paid during the period for -
Interest	1,280	2,458	3,017
Income taxes, net	5,847	4,111	6,132
NON-CASH FINANCING ACTIVITY:
Common stock issued for acquisitions		3,301	94
Debt assumed in acquisitions			$ 5,553