Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 101,971	$ 245,935
Accounts receivable, net (Note 1)	448,320	459,952
Inventories (Note 1)	41,120	41,987
Prepaid expenses and other	37,655	38,657
Total current assets	629,066	786,531
Property, plant and equipment, net (Note 1)	148,905	175,567
Goodwill (Note 2)	636,471	636,471
Other intangible assets, net (Note 2)	213,613	233,817
Other assets	16,392	13,272
Total assets	1,644,447	1,845,658
Current liabilities:
Current portion long-term debt (Note 3)	15,000	7,058
Accounts payable	334,378	329,602
Progress billings	39,975	53,001
Accrued expenses (Note 4)	98,409	99,612
Total current liabilities	487,762	489,273
Long-term debt (Note 3)	587,560	699,169
Deferred income taxes	67,404	78,764
Other non-current liabilities	52,187	49,568
Total liabilities	1,194,913	1,316,774
Commitments and contingencies (Note 6 and Note 7)
Stockholders' equity:
Preferred stock ($0.01 par value; 25,000,000 shares authorized; no shares issued or outstanding at December 31, 2011 and 2010)
Common stock ($0.01 par value; 100,000,000 shares authorized; 65,398,539 and 65,283,749 shares issued at December 31, 2011 and 2010, respectively; 42,347,368 and 50,361,749 shares outstanding at December 31, 2011 and 2010, respectively)	654	653
Additional paid-in capital	123,881	124,988
Retained earnings	1,021,566	908,136
Accumulated other comprehensive income	2,775	3,299
Treasury stock, at cost (23,051,171 and 14,922,000 shares at December 31, 2011 and 2010, respectively)	(699,342)	(508,192)
Total stockholders' equity	449,534	528,884
Total liabilities and stockholders' equity	$ 1,644,447	$ 1,845,658