Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 90,344	$ 101,971
Accounts receivable, net (Note 1)	399,341	448,320
Inventories (Note 1)	31,860	41,120
Prepaid expenses and other	55,080	37,655
Total current assets	576,625	629,066
Property, plant and equipment, net (Note 1)	131,566	148,905
Goodwill (Note 2)	628,886	636,471
Other intangible assets, net (Note 2)	221,403	213,613
Other assets	16,085	16,392
Total assets	1,574,565	1,644,447
Current liabilities:
Current portion long-term debt (Note 3)	18,750	15,000
Accounts payable	284,473	334,378
Progress billings	40,552	39,975
Accrued expenses (Note 4)	82,008	98,409
Total current liabilities	425,783	487,762
Long-term debt (Note 3)	572,561	587,560
Deferred income taxes	66,672	67,404
Other non-current liabilities	44,450	52,187
Total liabilities	1,109,466	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 September 30, 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 September 30, 2012 and December 31, 2011, respectively; 39,155,646 and 42,347,368 shares outstanding at September 30, 2012 and December 31, 2011, respectively)	654	654
Additional paid-in capital	111,600	123,881
Retained earnings	1,106,434	1,021,566
Accumulated other comprehensive income	2,340	2,775
Treasury stock, at cost (26,239,353 and 23,051,171 shares at September 30, 2012 and December 31, 2011, respectively)	755,929	699,342
Total stockholders' equity	465,099	449,534
Total liabilities and stockholders' equity	$ 1,574,565	$ 1,644,447