Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 33,087	$ 206,167
Accounts receivable (less allowance for losses of $1,640 in 2015 and $1,725 in 2014)	176,360	112,660
Short-term investments	13,423
Prepaid expenses	22,334	17,851
Income tax receivable	21,080	19
Other current assets	1,931	339
Total current assets	268,215	337,036
Accounts receivable, long-term	2,777	1,761
Property and equipment, net	101,112	65,910
Deferred income taxes		5,504
Other assets:
Goodwill	653,666	124,142
Other intangibles, net	295,378	34,722
Cost method investment	15,000
Non-current investments and other assets	20,422	737
Total assets	1,356,570	569,812
Current liabilities:
Accounts payable	6,789	4,119
Accrued liabilities	49,156	39,508
Deferred revenue	281,627	189,212
Total current liabilities	337,572	$ 232,839
Revolving line of credit	66,000
Deferred revenue, long-term	3,115
Deferred income taxes	$ 91,026
Commitments and contingencies
Shareholders' equity:
Preferred stock, $10.00 par value; 1,000,000 shares authorized; none issued
Common stock, $0.01 par value; 100,000,000 shares authorized; 48,147,969 shares issued in 2015 and 2014	$ 481	$ 481
Additional paid-in capital	607,755	201,389
Accumulated other comprehensive loss, net of tax	(46)	(46)
Retained earnings	326,019	261,150
Treasury stock, at cost; 11,373,666 and 14,678,782 shares in 2015 and 2014, respectively	(75,352)	(126,001)
Total shareholders' equity	858,857	336,973
Liabilities and Shareholders' equity, Total	$ 1,356,570	$ 569,812