Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 11,073	$ 19,715
Trade accounts receivable, net of allowance for doubtful accounts of $4,208 as of June 30, 2012, and $4,615 as of December 31, 2011	61,304	62,886
Prepaid expenses and other current assets	7,883	7,141
Short-term equity and other investments	1,703	1,703
Deferred tax assets	5,047	6,398
Total current assets	87,010	97,843
Long-term equity and other investments	11,945	13,210
Property and equipment, net	65,808	70,651
Goodwill, net	45,242	45,430
Other intangibles, net	9,171	10,526
Noncurrent deferred tax assets	1,326
Other noncurrent assets	1,098	1,308
Total assets	221,600	238,968
Liabilities and Stockholders' Equity
Accounts payable	8,667	10,534
Accrued expenses and other current liabilities	22,695	32,276
Deferred revenue	52,307	37,080
Total current liabilities	83,669	79,890
Noncurrent deferred tax liabilities		1,302
Other noncurrent liabilities	30,243	30,960
Total liabilities	113,912	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 June 30, 2012, and December 31, 2011	16,169	16,169
Retained earnings	109,864	128,772
Common stock held in treasury, 6,226 shares as of June 30, 2012, and 5,048 shares as of December 31, 2011	(3,113)	(2,524)
Accumulated other comprehensive loss	(15,232)	(15,601)
Total stockholders' equity	107,688	126,816
Total liabilities and stockholders' equity	$ 221,600	$ 238,968