Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,495	$ 6,406
Accounts receivable (less allowance for losses of $1,507 in 2013 and $1,621 in 2012)	76,220	99,212
Prepaid expenses	10,255	9,000
Other current assets	1,035	1,480
Deferred income taxes	5,544	5,544
Total current assets	97,549	121,642
Accounts receivable, long-term portion	1,621	1,187
Property and equipment, net	48,170	45,381
Non-current investments available-for-sale	2,012	2,037
Other assets:
Goodwill	121,011	121,011
Other intangibles, net	44,031	45,800
Sundry	980	1,197
Total assets	315,374	338,255
Current liabilities:
Accounts payable	2,528	3,167
Accrued liabilities	21,900	26,018
Deferred revenue	125,385	140,550
Total current liabilities	149,813	169,735
Revolving line of credit		18,000
Deferred income taxes	5,363	5,221
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 2013 and 2012	481	481
Additional paid-in capital	156,604	154,018
Accumulated other comprehensive loss, net of tax	(268)	(268)
Retained earnings	171,602	163,109
Treasury stock, at cost; 16,662,488 and 16,816,903 shares in 2013 and 2012, respectively	(168,221)	(172,041)
Total shareholders' equity	160,198	145,299
Liabilities and Shareholders' equity, Total	$ 315,374	$ 338,255