Condensed Consolidated Statements of Income (Loss) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Revenue	$ 53,403	$ 52,087	$ 148,709	$ 155,394
Operating expenses:
Cost of revenue	30,876	32,461	92,804	99,991
Selling, general and administrative expenses	13,944	13,242	38,285	38,575
Depreciation of property and equipment	2,034	1,716	6,069	4,808
Amortization of intangible assets	1,204	1,431	3,812	5,217
Total operating expenses	48,058	48,850	140,970	148,591
Operating income	5,345	3,237	7,739	6,803
Foreign currency transaction (gains) losses on short-term intercompany balances	(636)	(348)	(54)	(190)
Interest expense (income), net	75	515	(89)	1,548
Earnings before income taxes	5,906	3,070	7,882	5,445
Income tax expense	1,029	505	1,671	1,586
Net earnings	$ 4,877	$ 2,565	$ 6,211	$ 3,859
Basic earnings (loss) per common share (Note B) (usd per share)	$ 0.17	$ 0.10	$ 0.21	$ 0.15
Diluted earnings (loss) per common share (Note B) (usd per share)	$ 0.16	$ 0.10	$ 0.21	$ 0.15
Weighted-average common shares outstanding (Note B):
Basic (shares)	29,396	25,541	29,075	25,370
Diluted (shares)	29,815	26,250	29,517	25,942