CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash	$ 24,665	$ 22,987
Accounts receivable, net of allowance for doubtful accounts of $2,028 and $3,181	38,321	43,148
Income taxes receivable	754	731
Prepaid and other current assets	4,880	3,312
Total current assets	68,620	70,178
Fixed assets, net	18,459	16,610
Acquired intangible assets, net	48,561	49,120
Goodwill	172,406	171,745
Deferred income taxes	318	306
Other assets	2,080	2,136
Total assets	310,444	310,095
Current liabilities
Accounts payable and accrued expenses	17,877	20,220
Deferred revenue	89,710	84,615
Income taxes payable	4,928	3,467
Total current liabilities	112,515	108,302
Long-term debt, net	76,841	84,760
Deferred income taxes	8,129	7,901
Accrual for unrecognized tax benefits	2,548	2,513
Other long-term liabilities	2,760	2,736
Total liabilities	202,793	206,212
Commitments and contingencies (Note 6)
Stockholders' equity
Convertible preferred stock, $.01 par value, authorized 20,000 shares; no shares issued and outstanding	0	0
Common stock, $.01 par value, authorized 240,000; issued 83,208 and 81,989 shares, respectively; outstanding: 50,603 and 49,591 shares, respectively	832	820
Additional paid-in capital	369,430	366,247
Accumulated other comprehensive loss	(31,671)	(32,276)
Accumulated earnings	45,138	44,078
Treasury stock, 32,605 and 32,398 shares, respectively	(276,078)	(274,986)
Total stockholders’ equity	107,651	103,883
Total liabilities and stockholders’ equity	$ 310,444	$ 310,095