Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 235,358	$ 215,137
Receivables, net	277,096	290,397
Prepaid expenses	17,321	14,896
Other current assets	33,262	29,656
Total current assets	563,037	550,086
Property and equipment, net	111,962	109,880
Goodwill, net	195,733	193,831
Intangibles, net	50,896	60,620
Deferred charges and other assets	26,144	30,083
Total assets	947,772	944,500
Current liabilities:
Accounts payable	23,255	25,523
Accrued employee compensation and benefits	77,246	82,072
Current deferred income tax liabilities	1,120	144
Income taxes payable	1,959	3,662
Deferred revenue	28,119	34,245
Other accrued expenses and current liabilities	21,476	22,216
Total current liabilities	153,175	167,862
Deferred grants	4,810	5,110
Long-term debt	70,000	75,000
Long-term income tax liabilities	18,512	20,630
Other long-term liabilities	22,595	17,680
Total liabilities	$ 269,092	$ 286,282
Commitments and loss contingency (Note 22)
Shareholders' equity:
Preferred stock, $0.01 par value per share, 10,000 shares authorized; no shares issued and outstanding
Common stock, $0.01 par value per share, 200,000 shares authorized; 42,785 and 43,291 shares issued, respectively	$ 428	$ 433
Additional paid-in capital	275,380	279,288
Retained earnings	458,325	400,514
Accumulated other comprehensive income (loss)	(53,662)	(20,561)
Treasury stock at cost: 113 and 132 shares, respectively	(1,791)	(1,456)
Total shareholders' equity	678,680	658,218
Total liabilities and shareholders' equity	$ 947,772	$ 944,500