Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 52,121	$ 6,406
Accounts receivable (less allowance for losses of $1,285 in 2013 and $1,621 in 2012)	90,503	99,212
Prepaid expenses	12,107	9,000
Other current assets	4,522	1,480
Deferred income taxes	5,512	5,544
Total current assets	164,765	121,642
Accounts receivable, long-term portion	1,098	1,187
Property and equipment, net	63,145	45,381
Non-current investments available-for-sale	2,078	2,037
Other assets:
Goodwill	121,011	121,011
Other intangibles, net	40,628	45,800
Sundry	690	1,197
Total assets	393,415	338,255
Current liabilities:
Accounts payable	6,974	3,167
Accrued liabilities	23,162	26,018
Deferred revenue	151,510	140,550
Total current liabilities	181,646	169,735
Revolving line of credit		18,000
Deferred income taxes	4,141	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	166,297	154,018
Accumulated other comprehensive loss, net of tax	(209)	(268)
Retained earnings	191,698	163,109
Treasury stock, at cost; 15,916,346 and 16,816,903 shares in 2013 and 2012, respectively	(150,639)	(172,041)
Total shareholders' equity	207,628	145,299
Liabilities and Shareholders' equity, Total	$ 393,415	$ 338,255