CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 226,955	$ 259,219
Receivables	420,350	333,467
Inventories	65,771	64,335
Deferred income taxes, net	47,078	51,413
Other current assets	44,100	46,965
Total current assets	804,254	755,399
Investments	8,800	8,500
Property, plant and equipment, net	263,007	259,972
Goodwill	75,261	75,261
Other non-current assets	28,932	31,668
Total assets	1,180,254	1,130,800	[1]
Current liabilities:
Accounts payable and accrued expenses	245,364	234,379
Deferred revenues and customer advances	126,298	104,970
Total current liabilities	371,662	339,349
Long-term obligations	132,670	131,182
Other non-current liabilities	17,056	16,990
Total liabilities	521,388	487,521
Commitments and contingencies
Stockholders' equity:
Preferred Stock, par value $.01; 10,000,000 shares authorized, none outstanding
Common Stock, par value $.01; 200,000,000 shares authorized, 58,981,852 and 58,914,802 shares outstanding, respectively	590	589
Additional paid-in capital	568,405	566,624
Accumulated other comprehensive loss	(2,547)	(3,359)
Retained earnings	92,418	79,425
Total stockholders' equity	658,866	643,279
Total liabilities and stockholders' equity	$ 1,180,254	$ 1,130,800

[1] As of December 31, 2011.