Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 206,167	$ 78,876
Accounts receivable (less allowance for losses of $1,725 in 2014 and $1,113 in 2013)	112,660	106,570
Prepaid expenses	17,851	13,522
Income tax receivable	19	9,721
Other current assets	339	787
Deferred income taxes	9,674	7,759
Total current assets	346,710	217,235
Accounts receivable, long-term portion	1,761	588
Property and equipment, net	65,910	64,844
Other assets:
Goodwill	124,142	121,011
Other intangibles, net	34,722	38,986
Sundry and other	737	1,824
Total assets	573,982	444,488
Current liabilities:
Accounts payable	4,119	2,533
Accrued liabilities	39,508	32,839
Deferred revenue	189,212	156,738
Total current liabilities	232,839	192,110
Deferred income taxes	4,170	6,059
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 2014 and 2013	481	481
Additional paid-in capital	201,389	182,176
Accumulated other comprehensive loss, net of tax	(46)	(46)
Retained earnings	261,150	202,210
Treasury stock, at cost; 14,678,782 and 15,309,940 shares in 2014 and 2013, respectively	(126,001)	(138,502)
Total shareholders' equity	336,973	246,319
Liabilities and Shareholders' equity, Total	$ 573,982	$ 444,488