Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 42,983	$ 39,340
Accounts receivable, net of allowance for doubtful accounts of $156 at March 31, 2013 and $129 at December 31, 2012	8,507	6,996
Income tax refunds receivable	2,912	2,209
Deferred income taxes	2,218	2,218
Prepaid expenses and other current assets	2,808	2,454
Total current assets	59,428	53,217
Property and equipment, net	2,579	2,587
Goodwill	173,159	174,294
Intangible assets, net	83,675	86,736
Other assets	3,171	3,232
Total assets	322,012	320,066
Current liabilities:
Accounts payable	813	1,038
Accrued expenses and other current liabilities	14,985	17,319
Accrued income taxes		2,191
Deferred revenue	8,249	8,725
Current portion of long-term debt	12,321	10,000
Total current liabilities	36,368	39,273
Long-term debt, less current portion		12,321
Other long-term liabilities	584	613
Deferred income taxes	28,269	26,832
Reserve for income taxes, net of current portion	1,010	963
Accrued pension benefits	4,885	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: 38,267,656 at March 31, 2013 and 37,331,796 at December 31, 2012.	38	37
Additional paid-in capital	189,196	178,681
Treasury stock, at cost, 116,351 shares at March 31, 2013 and 116,101 shares at December 31, 2012	(86)	(86)
Retained earnings	63,297	56,980
Accumulated other comprehensive income	(1,549)	(506)
Total stockholders' equity	250,896	235,106
Total liabilities and stockholders' equity	$ 322,012	$ 320,066