Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 62,047	$ 190,452
Accounts receivable, net	95,543	76,058
Prepaid expenses	21,986	19,197
Other current assets	15,163	18,447
Income taxes recoverable	8,377	4,809
Total current assets	203,116	308,963
Non-current assets:
Property and equipment, net	35,260	36,498
Assets designated for retirement and pension plans	17,667	16,857
Investments	16,388	14,145
Other non-current assets	13,516	11,115
Goodwill	136,691	131,122
Other intangible assets, net	20,398	18,687
Deferred income taxes	33,385	35,331
Total non-current assets	273,305	263,755
Total assets	476,421	572,718
Current liabilities:
Accounts payable	7,779	6,150
Accrued salaries and employee benefits	60,463	158,875
Deferred revenue, net	34,658	29,724
Other current liabilities	34,596	31,239
Income taxes payable	1,135	3,442
Total current liabilities	138,631	229,430
Accrued Salaries And Employee Benefits Noncurrent	22,891	32,690
Non-current liabilities:
Retirement and pension plans	39,296	35,949
Other non-current liabilities	20,740	19,847
Total non-current liabilities	82,927	88,486
Total liabilities	$ 221,558	$ 317,916
Commitments and contingencies (Note 18)
Stockholders’ equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized, no shares issued at September 30, 2015 and December 31, 2014	$ 0	$ 0
Common stock, $0.01 par value, 100,000,000 shares authorized, 19,585,777 shares issued, 18,379,398 and 18,239,939 shares outstanding at September 30, 2015 and December 31, 2014, respectively	196	196
Treasury stock at cost, 1,206,379 and 1,345,838 shares at September 30, 2015 and December 31, 2014, respectively	(33,979)	(39,583)
Additional paid in capital	226,610	232,358
Retained earnings	51,447	52,572
Accumulated other comprehensive income	10,589	9,259
Total stockholders’ equity	254,863	254,802
Total liabilities and stockholders’ equity	$ 476,421	$ 572,718