Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 47,860	$ 85,996
Accounts receivable (less allowance for doubtful accounts of $2,421 at June 30, 2011 and $3,103 at December 31, 2010)	147,166	151,006
Inventory	7,578	7,324
Prepaid expenses	9,940	8,943
Prepaid income taxes	2,285	0
Current deferred income tax asset	6,495	8,911
Other current assets	6,181	6,283
Total current assets	227,505	268,463
Property, plant and equipment (less accumulated depreciation of $252,637 at June 30, 2011 and $253,730 at December 31, 2010)	73,381	72,659
Goodwill, net	565,651	565,651
Other intangible assets (less accumulated amortization of $15,362 at June 30, 2011 and $14,942 at December 31, 2010)	15,368	15,788
Other assets	3,998	4,319
Total assets	885,903	926,880
Liabilities and Stockholders' Equity
Current maturities of long-term debt	165,500	133,000
Accounts payable	45,979	56,085
Accrued payroll and related expenses	18,558	24,780
Customer advances and deferred revenue	38,444	36,834
Income taxes payable	1,239	2,247
Other current liabilities	21,462	28,017
Total current liabilities	291,182	280,963
Long-term debt	0	60,000
Other long-term liabilities (including deferred income taxes of $92,885 at June 30, 2011 and $85,655 at December 31, 2010)	153,028	148,094
Total liabilities	444,210	489,057
Stockholders' equity
Common stock, $1 par value per share, 250,000,000 shares authorized. 118,450,705 shares issued at June 30, 2011 and 118,296,334 shares issued at December 31, 2010	118,451	118,296
Additional paid-in capital	339,339	336,795
Retained earnings	1,259,527	1,252,438
Less treasury stock: 55,665,662 shares at cost at June 30, 2011 and 54,664,293 shares at cost at December 31, 2010	(1,244,336)	(1,236,024)
Accumulated other comprehensive loss	(31,288)	(33,682)
Total stockholders' equity	441,693	437,823
Total liabilities and stockholders' equity	$ 885,903	$ 926,880