Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flow from operating activities
Net Income	$ 16,165	$ 11,938	$ 8,372
Adjustments:
Depreciation and amortization expense	2,919	2,271	1,711
Equity-based compensation	2,236	1,654	1,349
Increase (Decrease) in Deferred Income Taxes	116	(883)	(154)
Deferred compensation	600	(1,036)	(343)
(Gain) loss on sales of property and equipment	20	(136)	(9)
Changes in assets and liabilities:
Increase in accounts receivable	(2,239)	(10,561)	(13,210)
(Increase) decrease in prepaid and other current assets	403	93	(51)
Decrease in other assets	50	1,091	1,318
Increase (decrease) in accounts payable	(293)	1,250	(581)
Increase (Decrease) in Employee Related Liabilities	1,002	1,530	9,962
Increase (decrease) in income taxes payable	(1,067)	1,176	526
Increase (decrease) in advance billings on contracts	707	(568)	850
Increase (decrease) in other current liabilities	732	733	(493)
Increase (decrease) in other long-term liabilities	(195)	53	(82)
Net cash provided by operating activities	21,156	8,605	9,165
Cash flow from investing activities:
Additions to property and equipment	(1,872)	(1,584)	(1,000)
Additions to capitalized software	0	(364)	(1,016)
Deferred compensation plan investments, net	(113)	97	24
Proceeds from sales of property and equipment	5	176	41
Net cash used in investing activities	(1,980)	(1,675)	(1,951)
Cash flow from financing activities:
Proceeds from stock option plan exercises	1,144	2,007	781
Excess tax benefits from equity-based compensation	2,615	1,801	242
Proceeds from Employee Stock Purchase Plan	294	274	178
Change in cash overdraft, net	(777)	539	(321)
Purchase of stock for treasury	(4,591)	(3,601)	(2,993)
Net cash provided by (used in) financing activities	(1,315)	1,020	(2,113)
Effect of exchange rates on cash and cash equivalents	339	(373)	(687)
Net increase in cash and cash equivalents	18,200	7,577	4,414
Cash and cash equivalents at beginning of year	22,414	14,837	10,423
Cash and cash equivalents at end of year	$ 40,614	$ 22,414	$ 14,837