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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash flows from operating activities:    
Net income (loss) $ 7,287 $ (30,464)
Adjustments:    
Depreciation and amortization 87,308 90,478
Long-lived asset impairment 4,332  
Deferred financing cost amortization 2,886 2,950
Loss from discontinued operations, net of tax 625 2,138
Amortization of debt discount 4,960 4,416
Provision for doubtful accounts 123 599
Gain on sale of property, plant and equipment (364) (2,750)
Equity in income of non-consolidated affiliates (37,339)  
Amortization of payments to terminate interest rate swaps 3,888 4,849
(Gain) loss on remeasurement of intercompany balances (5,427) 1,813
Stock-based compensation expense 4,438 5,462
Deferred income tax provision (11,056) (7,467)
Changes in assets and liabilities:    
Accounts receivable and notes 71,578 (2,825)
Inventory (23,926) (560)
Costs and estimated earnings versus billings on uncompleted contracts (49,629) (7,011)
Other current assets 6,397 5,408
Accounts payable and other liabilities (11,275) (33,642)
Deferred revenue (14,024) (10,317)
Other (2,191) 2,375
Net cash provided by continuing operations 38,591 25,452
Net cash provided by discontinued operations   662
Net cash provided by operating activities 38,591 26,114
Cash flows from investing activities:    
Capital expenditures (116,720) (51,412)
Proceeds from sale of property, plant and equipment 9,952 27,499
Return of investments in non-consolidated affiliates 37,563  
(Increase) decrease in restricted cash (15) 304
Cash invested in non-consolidated affiliates (224)  
Net cash used in investing activities (69,444) (23,609)
Cash flows from financing activities:    
Proceeds from borrowings of long-term debt 844,500 604,981
Repayments of long-term debt (913,048) (766,961)
Payments for debt issue costs (525) (980)
Net proceeds from the sale of Partnership units 114,568 162,236
Proceeds from stock options exercised   239
Proceeds from stock issued pursuant to our employee stock purchase plan 405 478
Purchases of treasury stock (1,757) (2,366)
Stock-based compensation excess tax benefit 194 869
Distributions to noncontrolling partners in the Partnership (12,207) (6,468)
Net cash provided by (used in) financing activities 32,130 (7,972)
Effect of exchange rate changes on cash and equivalents 243 (1,364)
Net increase (decrease) in cash and cash equivalents 1,520 (6,831)
Cash and cash equivalents at beginning of period 22,039 44,616
Cash and cash equivalents at end of period $ 23,559 $ 37,785