Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 66,469	$ 19,715
Trade accounts receivable, net of allowance for doubtful accounts of $4,856 in 2012, and $4,615 in 2011	59,185	62,886
Prepaid expenses and other current assets	6,516	7,141
Deferred tax assets	5,513	6,398
Total current assets	137,683	96,140
Equity and other investments	12,501	14,913
Property and equipment, net	61,669	70,651
Goodwill, net	45,540	45,430
Other intangibles, net	8,177	10,526
Noncurrent deferred tax assets	2,384
Other noncurrent assets	1,138	1,308
Total assets	269,092	238,968
Liabilities and Stockholders' Equity
Accounts payable	11,407	10,534
Accrued expenses and other current liabilities	33,879	32,276
Deferred revenue	38,497	37,080
Total current liabilities	83,783	79,890
Noncurrent deferred tax liabilities		1,302
Other noncurrent liabilities	31,900	30,960
Total liabilities	115,683	112,152
Stockholders' equity
Preferred stock, $100.00 par value, 750 shares authorized, no shares issued
Common stock, $0.50 par value, 500,000 shares authorized, 32,338 shares issued as of December 31, 2012, and 2011	16,169	16,169
Retained earnings	156,530	128,772
Common stock held in treasury, 5,714 shares in 2012, and 5,048 shares in 2011	(2,857)	(2,524)
Accumulated other comprehensive loss	(16,433)	(15,601)
Total stockholders' equity	153,409	126,816
Total liabilities and stockholders' equity	$ 269,092	$ 238,968