CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
REVENUE:
Operating revenue	$ 344,750	$ 261,265	$ 217,595
Reimbursable expenses	28,335	22,061	29,571
Total Revenue	373,085	283,326	247,166
OPERATING EXPENSE:
Direct cost of operating revenue (exclusive of depreciation and amortization shown separately below)	145,629	90,954	72,004
Reimbursed direct costs	27,426	21,773	28,686
General and administrative	117,023	97,779	85,645
Depreciation and software and leasehold amortization	27,399	23,081	20,391
Amortization of identifiable intangible assets	26,588	21,323	9,190
Fair value adjustment to contingent consideration	(17,188)	(7,166)
Acquisition related (income) expense	(200)	7,681	2,125
Intangible asset impairment expense	1,777	1,278
Other operating (income) expense	(20)		656
Total Operating Expense	328,434	256,703	218,697
INCOME FROM OPERATIONS	44,651	26,623	28,469
INTEREST EXPENSE (INCOME):
Interest expense	9,263	5,844	1,931
Interest income	(18)	(128)	(32)
Net Interest Expense	9,245	5,716	1,899
INCOME BEFORE INCOME TAXES	35,406	20,907	26,570
PROVISION FOR INCOME TAXES	12,979	8,827	12,641
NET INCOME	$ 22,427	$ 12,080	$ 13,929
NET INCOME PER SHARE INFORMATION:
Basic (in dollars per share)	$ 0.62	$ 0.34	$ 0.38
Diluted (in dollars per share)	$ 0.61	$ 0.33	$ 0.36
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	35,497	35,186	36,498
Diluted (in shares)	36,373	36,506	39,512
Cash dividends declared per common share (in dollars per share)	$ 0.385	$ 0.205	$ 0.07