Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Assets
Cash and cash equivalents	$ 83,735		$ 66,469
Trade accounts receivable, net of allowance for doubtful accounts of $4,782 as of March 31, 2013, and $4,856 as of December 31, 2012	60,825		59,185
Prepaid expenses and other current assets	6,286		6,516
Deferred tax assets	5,404		5,513
Total current assets	156,250		137,683
Equity and other investments	9,114		12,501
Property and equipment, net	59,631		61,669
Goodwill, net	45,364		45,540
Other intangibles, net	7,447		8,177
Noncurrent deferred tax assets	2,836		2,384
Other noncurrent assets	1,049		1,138
Total assets	281,691		269,092
Liabilities and Stockholders' Equity
Accounts payable	13,267		11,407
Accrued expenses and other current liabilities	26,479		33,879
Deferred revenue	39,966		38,497
Total current liabilities	79,712		83,783
Noncurrent liabilities	30,404		31,900
Total liabilities	110,116		115,683
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 March 31, 2013, and December 31, 2012	16,169		16,169
Retained earnings	174,160		156,530
Common stock held in treasury, 5,533 shares as of March 31, 2013, and 5,714 shares as of December 31, 2012	(2,767)		(2,857)
Accumulated other comprehensive loss	(15,987)	[1]	(16,433)	[1]
Total stockholders' equity	171,575		153,409
Total liabilities and stockholders' equity	$ 281,691		$ 269,092

[1] All amounts are net of tax. Amounts in parentheses indicate debits.