Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 37,051	$ 19,715
Trade accounts receivable, net of allowance for doubtful accounts of $4,562 as of September 30, 2012, and $4,615 as of December 31, 2011	60,509	62,886
Prepaid expenses and other current assets	8,359	7,141
Deferred tax assets	4,586	6,398
Total current assets	110,505	96,140
Equity and other investments	7,506	14,913
Property and equipment, net	63,784	70,651
Goodwill, net	45,359	45,430
Other intangibles, net	8,669	10,526
Noncurrent deferred tax assets	1,921
Other noncurrent assets	1,221	1,308
Total assets	238,965	238,968
Liabilities and Stockholders' Equity
Accounts payable	10,159	10,534
Accrued expenses and other current liabilities	23,837	32,276
Deferred revenue	49,280	37,080
Total current liabilities	83,276	79,890
Noncurrent deferred tax liabilities		1,302
Other noncurrent liabilities	30,967	30,960
Total liabilities	114,243	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 September 30, 2012, and December 31, 2011	16,169	16,169
Retained earnings	126,304	128,772
Common stock held in treasury, 6,178 shares as of September 30, 2012, and 5,048 shares as of December 31, 2011	(3,089)	(2,524)
Accumulated other comprehensive loss	(14,662)	(15,601)
Total stockholders' equity	124,722	126,816
Total liabilities and stockholders' equity	$ 238,965	$ 238,968