CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash	$ 23,456	$ 22,987
Accounts receivable, net of allowance for doubtful accounts of $1,863 and $3,181	32,335	43,148
Income taxes receivable	737	731
Prepaid and other current assets	4,508	3,312
Total current assets	61,036	70,178
Fixed assets, net	19,346	16,610
Acquired intangible assets, net	48,002	49,120
Goodwill	174,790	171,745
Deferred income taxes	361	306
Other assets	2,073	2,136
Total assets	305,608	310,095
Current liabilities
Accounts payable and accrued expenses	19,500	20,220
Deferred revenue	86,380	84,615
Income taxes payable	2,029	3,467
Total current liabilities	107,909	108,302
Long-term debt, net	69,922	84,760
Deferred income taxes	8,586	7,901
Accrual for unrecognized tax benefits	2,584	2,513
Other long-term liabilities	2,800	2,736
Total liabilities	191,801	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 83,026 and 81,989 shares, respectively; outstanding: 50,416 and 49,591 shares, respectively	830	820
Additional paid-in capital	371,517	366,247
Accumulated other comprehensive loss	(29,405)	(32,276)
Accumulated earnings	46,960	44,078
Treasury stock, 32,609 and 32,398 shares, respectively	(276,095)	(274,986)
Total stockholders’ equity	113,807	103,883
Total liabilities and stockholders’ equity	$ 305,608	$ 310,095