Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 1,052	$ 2,969
Accounts receivable, net	198,709	179,041
Prepaid expenses and other current assets	25,054	22,766
Deferred income tax assets	17,821	16,229
Total current assets	242,636	221,005
Property and equipment, net	45,342	41,138
Intangible assets, net	16,123	16,825
Goodwill	619,932	570,280
Other assets	30,417	25,953
Total assets	954,450	875,201
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	18,042	16,261
Accrued liabilities	11,557	8,432
Accrued compensation-related costs	84,813	95,451
Income tax payable	7,129	3,558
Other current liabilities	35,754	32,622
Total current liabilities	157,295	156,324
Non-current liabilities:
Deferred income tax liabilities	67,623	52,964
Other non-current liabilities	35,606	20,445
Bank debt - non-current	134,183	131,790
Total non-current liabilities	237,412	205,199
Total liabilities	394,707	361,523
Stockholders' equity:
Common stock	62	61
Additional paid-in capital	582,363	567,627
Treasury stock	(216,500)	(197,602)
Retained earnings	202,542	156,373
Accumulated other comprehensive loss	(8,724)	(12,781)
Total stockholders' equity	559,743	513,678
Total liabilities and stockholders' equity	$ 954,450	$ 875,201