CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 51,669	$ 39,340
Accounts receivable, net of allowance for doubtful accounts of $154 at June 30, 2013 and $129 at December 31, 2012	7,697	6,996
Income tax refunds receivable	3,845	2,209
Deferred income taxes	2,210	2,218
Prepaid expenses and other current assets	2,301	2,454
Total current assets	67,722	53,217
Property and equipment, net	2,422	2,587
Goodwill	173,668	174,294
Intangible assets, net	81,173	86,736
Other assets	3,093	3,232
Total assets	328,078	320,066
Current liabilities:
Accounts payable	1,153	1,038
Accrued expenses and other current liabilities	16,244	17,319
Accrued income taxes		2,191
Deferred revenue	10,170	8,725
Current portion of long-term debt		10,000
Total current liabilities	27,567	39,273
Long-term debt, less current portion		12,321
Other long-term liabilities	702	613
Deferred income taxes	29,797	26,832
Reserve for income taxes, net of current portion	1,022	963
Accrued pension benefits	5,008	4,958
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; Issued: 38,738,074 at June 30, 2013 and 37,331,796 at December 31, 2012	39	37
Additional paid-in capital	196,921	178,681
Treasury stock, at cost, 129,158 shares at June 30, 2013 and 116,101 shares at December 31, 2012	(86)	(86)
Retained earnings	68,283	56,980
Accumulated other comprehensive loss	(1,175)	(506)
Total stockholders' equity	263,982	235,106
Total liabilities and stockholders' equity	$ 328,078	$ 320,066