CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 88,092	$ 78,876
Short-term investments available-for-sale	800
Accounts receivable (less allowance for losses of $1,262 in 2014 and $1,113 in 2013)	144,234	106,570
Prepaid expenses	15,838	13,522
Income tax receivable	3,711	9,721
Other current assets	598	787
Deferred income taxes	7,759	7,759
Total current assets	261,032	217,235
Accounts receivable, long-term portion	1,127	588
Property and equipment, net	67,160	64,844
Non-current investments available-for-sale	0	1,288
Other assets:
Goodwill	121,011	121,011
Other intangibles, net	35,804	38,986
Sundry	683	536
Total assets	486,817	444,488
Current liabilities:
Accounts payable	2,584	2,533
Accrued liabilities	28,602	32,839
Deferred revenue	184,578	156,738
Total current liabilities	215,764	192,110
Deferred income taxes	4,574	6,059
Commitments and contingencies
Shareholders' equity:
Preferred stock, $10.00 par value; 1,000,000 shares authorized; none issued	0
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	186,418	182,176
Accumulated other comprehensive loss, net of tax	(46)	(46)
Retained earnings	228,833	202,210
Treasury stock, at cost; 15,312,486 and 15,309,940 shares in 2014 and 2013, respectively	(149,207)	(138,502)
Total shareholders' equity	266,479	246,319
Liabilities and Shareholders' equity, Total	$ 486,817	$ 444,488