Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 75,237	$ 101,971
Accounts receivable, net (Note 1)	378,706	448,320
Inventories (Note 1)	30,366	41,120
Prepaid expenses and other	54,269	37,655
Total current assets	538,578	629,066
Property, plant and equipment, net (Note 1)	138,070	148,905
Goodwill (Note 2)	628,886	636,471
Other intangible assets, net (Note 2)	224,666	213,613
Other assets	15,212	16,392
Total assets	1,545,412	1,644,447
Current liabilities:
Current portion long-term debt (Note 3)	15,000	15,000
Accounts payable	257,072	334,378
Progress billings	39,296	39,975
Accrued expenses (Note 4)	90,257	98,409
Total current liabilities	401,625	487,762
Long-term debt (Note 3)	580,061	587,560
Deferred income taxes	66,798	67,404
Other non-current liabilities	53,023	52,187
Total liabilities	1,101,507	1,194,913
Commitments and contingencies (Note 5)
Stockholders' equity:
Preferred stock ($0.01 par value; 25,000,000 shares authorized; no shares issued or outstanding at March 31, 2012 and December 31, 2011)	0	0
Common stock ($0.01 par value; 100,000,000 shares authorized; 65,394,999 and 65,398,539 shares issued at March 31, 2012 and December 31, 2011, respectively; 42,904,300 and 42,347,368 shares outstanding at March 31, 2012 and December 31, 2011, respectively)	654	654
Additional paid-in capital	113,865	123,881
Retained earnings	1,069,694	1,021,566
Accumulated other comprehensive income	2,349	2,775
Treasury stock, at cost (22,490,699 and 23,051,171 shares at March 31, 2012 and December 31, 2011, respectively)	(742,657)	(699,342)
Total stockholders' equity	443,905	449,534
Total liabilities and stockholders' equity	$ 1,545,412	$ 1,644,447