Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 94,711	$ 101,971
Accounts receivable, net (Note 1)	426,899	448,320
Inventories (Note 1)	43,253	41,120
Prepaid expenses and other	36,589	37,655
Total current assets	601,452	629,066
Property, plant and equipment, net (Note 1)	125,832	148,905
Goodwill (Note 2)	632,438	636,471
Other intangible assets, net (Note 2)	215,171	213,613
Other assets	14,142	16,392
Total assets	1,589,035	1,644,447
Current liabilities:
Current portion long-term debt (Note 3)	22,500	15,000
Accounts payable	281,320	334,378
Progress billings	39,595	39,975
Accrued expenses (Note 4)	107,467	98,409
Total current liabilities	450,882	487,762
Long-term debt (Note 3)	565,061	587,560
Deferred income taxes	57,258	67,404
Other non-current liabilities	42,271	52,187
Total liabilities	1,115,472	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 December 31, 2012 and 2011)	0	0
Common stock ($0.01 par value; 100,000,000 shares authorized; 65,394,999 and 65,398,539 shares issued at December 31, 2012 and 2011, respectively; 38,766,530 and 42,347,368 shares outstanding at December 31, 2012 and 2011, respectively)	654	654
Additional paid-in capital	102,373	123,881
Retained earnings	1,128,540	1,021,566
Accumulated other comprehensive income	3,574	2,775
Treasury stock, at cost (26,628,469 and 23,051,171 shares at December 31, 2012 and 2011, respectively)	761,578	699,342
Stockholders' equity	473,563	449,534
Total liabilities and stockholders' equity	$ 1,589,035	$ 1,644,447