Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 74,985	$ 94,711
Accounts receivable, net (Note 1)	408,322	426,899
Inventories (Note 1)	36,705	43,253
Prepaid expenses and other	49,006	36,589
Total current assets	569,018	601,452
Property, plant and equipment, net (Note 1)	109,826	125,832
Goodwill (Note 2)	632,438	632,438
Other intangible assets, net (Note 2)	203,984	215,171
Other assets	13,436	14,142
Total assets	1,528,702	1,589,035
Current liabilities:
Current portion long-term debt (Note 3)	33,750	22,500
Accounts payable	264,144	281,320
Progress billings	38,084	39,595
Accrued expenses (Note 4)	96,342	107,467
Total current liabilities	432,320	450,882
Long-term debt (Note 3)	502,650	565,061
Deferred income taxes	57,968	57,258
Other non-current liabilities	38,002	42,271
Total liabilities	1,030,940	1,115,472
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, 2013 and December 31, 2012)	0	0
Common stock ($0.01 par value; 100,000,000 shares authorized; 65,394,999 shares issued at September 30, 2013 and December 31, 2012; 38,430,931 and 38,766,530 shares outstanding at September 30, 2013 and December 31, 2012, respectively)	654	654
Additional paid-in capital	84,866	102,373
Retained earnings	1,169,075	1,128,540
Accumulated other comprehensive income	3,796	3,574
Treasury stock, at cost (26,964,068 and 26,628,469 shares at September 30, 2013 and December 31, 2012, respectively)	(760,629)	(761,578)
Total stockholders' equity	497,762	473,563
Total liabilities and stockholders' equity	$ 1,528,702	$ 1,589,035