Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 95,441	$ 87,520
Accounts receivable, net of allowance for doubtful accounts of $263 at March 31, 2016 and $264 at December 31, 2015	16,378	15,179
Income tax refunds receivable	2,132	2,558
Prepaid expenses and other current assets	3,857	3,846
Total current assets	117,808	109,103
Property and equipment, net	14,637	15,204
Goodwill	187,514	185,735
Intangible assets, net	67,982	69,264
Restricted cash	9,323	9,304
Other assets	3,104	3,177
Total assets	400,368	391,787
Current liabilities:
Accounts payable	2,281	1,385
Accrued expenses and other current liabilities	19,507	21,422
Accrued income taxes payable	1,094	2,395
Deferred revenue	9,932	10,086
Total current liabilities	32,814	35,288
Other long-term liabilities	7,480	6,914
Deferred income taxes	38,756	35,159
Reserve for income taxes, net of current portion	2,376	2,316
Accrued pension benefits	$ 5,199	$ 4,928
Commitments and contingencies (Note 13)
Stockholders' equity:
Preferred stock, $0.001 par value, Authorized shares: 10,000,000; Issued and outstanding: none
Common stock, $0.001 par value, Authorized shares: 250,000,000; Shares issued: 42,683,188 at March 31, 2016 and 42,019,646 at December 31, 2015.	$ 43	$ 42
Additional paid-in capital	259,865	256,215
Treasury stock, at cost, 2,035,825 shares at March 31, 2016 and 1,999,354 shares at December 31, 2015	(50,455)	(50,455)
Retained earnings	109,795	108,908
Accumulated other comprehensive loss	(5,505)	(7,528)
Total stockholders' equity	313,743	307,182
Total liabilities and stockholders' equity	$ 400,368	$ 391,787