Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 74,132	$ 98,810
Marketable investments (Note 5)	81,013	134,876
Accounts receivable, net (Note 13)	77,543	74,623
Deferred commissions	12,939	9,410
Prepaid expenses and other current assets	20,762	18,904
Total current assets	266,389	336,623
Long-term marketable investments (Note 5)		8,970
Property and equipment, net (Note 13)	39,868	46,300
Goodwill (Note 4)	80,001	78,954
Intangible assets, net (Note 4)	5,777	7,920
Other assets	10,167	9,248
Total assets	402,202	488,015
Current Liabilities:
Accounts payable	1,024	772
Accrued expenses and other current liabilities (Note 13)	33,471	30,078
Deferred revenue	152,903	150,495
Total current liabilities	187,398	181,345
Non-current liabilities (Note 13)	10,142	9,463
Total liabilities	197,540	190,808
Commitments (Note 8)
Stockholders' Equity (Note 9):
Preferred stock, $.01 par value Authorized - 500 shares, issued and outstanding - none
Common stock, $.01 par value Authorized - 125,000 shares Issued - 20,491 and 31,451 in 2013 and 2012, respectively Outstanding 19,756 and 22,293 in 2013 and 2012, respectively	205	315
Additional paid-in capital	109,676	389,362
Retained earnings	118,415	117,785
Treasury stock 735 and 9,158 in 2013 and 2012, respectively, at cost	(26,088)	(210,843)
Accumulated other comprehensive income	2,454	588
Total stockholders' equity	204,662	297,207
Total liabilities and stockholders' equity	$ 402,202	$ 488,015