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Consolidating Financial Statements (Details 2) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 12 Months Ended
Nov. 30, 2009
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities:        
Net cash provided by (used in) continuing operations   $ 118,988 $ 368,255 $ 476,808
Net cash provided by discontinued operations   1,336 (3,880) 710
Net cash provided by operating activities   120,324 364,375 477,518
Cash flows from investing activities:        
Capital expenditures   (282,791) (235,990) (368,901)
Proceeds from sale of property, plant and equipment 37,000 46,258 31,195 69,097
Cash paid for business acquisition   (3,000)    
Proceeds from sale of business       5,642
Return of investments in non-consolidated affiliates       3,139
(Increase) decrease in restricted cash   820 12,930 (7,308)
Cash invested in non-consolidated affiliates   (471) (609) (1,959)
Net proceeds from the sale of Partnership units   289,908 109,365  
Net cash provided by (used) in continuing operations   50,724 (83,109) (300,290)
Net cash provided by (used in) discontinued operations     89,509 (710)
Net cash provided by (used in) investing activities   50,724 6,400 (301,000)
Cash flows from financing activities:        
Proceeds from borrowings of long-term debt   1,893,740 2,098,244 1,180,815
Repayments of long-term debt   (2,036,171) (2,478,397) (1,342,785)
Payments for debt issue costs   (8,823) (12,034) (12,293)
Proceeds from stock options exercised   526 840  
Proceeds from stock issued pursuant to our employee stock purchase plan   1,887 2,224 2,845
Purchases of treasury stock   (2,941) (2,061) (976)
Stock-based compensation excess tax benefit   1,034 1,182 119
Proceeds from warrants sold       53,138
Payment from call options       (89,408)
Distributions to noncontrolling partners in the Partnership   (39,870) (18,030) (15,459)
Net cash used in financing activities   (190,618) (408,032) (224,004)
Effect of exchange rate changes on cash and equivalents   (3,007) (1,872) 7,325
Net increase (decrease) in cash and cash equivalents   (22,577) (39,129) (40,161)
Cash and cash equivalents at end of period   22,039 44,616 83,745
Cash and cash equivalents at beginning of period   44,616 83,745 123,906
Parent [Member]
        
Cash flows from operating activities:        
Net cash provided by (used in) continuing operations   282,416 48,796 (211,416)
Net cash provided by operating activities   282,416 48,796 (211,416)
Cash flows from investing activities:        
Return of investments in non-consolidated affiliates   (214,356) (50,089) 210,615
Net cash provided by (used) in continuing operations     (50,089) 210,615
Net cash provided by (used in) investing activities   (214,356) (50,089) 210,615
Cash flows from financing activities:        
Proceeds from borrowings of long-term debt   1,336,240 1,627,244 1,104,065
Repayments of long-term debt   (1,569,078) (1,459,836) (969,726)
Payments for debt issue costs   (7,666) (7,782) (7,411)
Proceeds from stock options exercised   526 840  
Proceeds from stock issued pursuant to our employee stock purchase plan   1,887 2,224 2,845
Purchases of treasury stock   (2,941) (2,061) (976)
Stock-based compensation excess tax benefit   1,034 1,182 119
Proceeds from warrants sold       53,138
Payment from call options       (89,408)
Borrowings (repayments) between subsidiaries, net   171,871 (160,407) (91,959)
Net cash used in financing activities   (68,127) 1,404 687
Net increase (decrease) in cash and cash equivalents   (67) 111 (114)
Cash and cash equivalents at end of period   93 160 49
Cash and cash equivalents at beginning of period   160 49 163
Subsidiary Issuer [Member]
        
Cash flows from operating activities:        
Net cash provided by (used in) continuing operations   2,127 (4,039) (1,002)
Net cash provided by operating activities   2,127 (4,039) (1,002)
Cash flows from investing activities:        
Return of investments in non-consolidated affiliates   (183,030) 112,497 211,617
Net cash provided by (used) in continuing operations     112,497 211,617
Net cash provided by (used in) investing activities   (183,030) 112,497 211,617
Cash flows from financing activities:        
Capital contribution (distribution), net   214,356 50,089 (210,615)
Borrowings (repayments) between subsidiaries, net   (33,453) (158,547)  
Net cash used in financing activities   180,903 (108,458) (210,615)
Cash and cash equivalents at end of period       0
Cash and cash equivalents at beginning of period     0 0
Guarantor Subsidiaries [Member]
        
Cash flows from operating activities:        
Net cash provided by (used in) continuing operations   (172,542) (240,601) 180,901
Net cash provided by operating activities   (172,542) (240,601) 180,901
Cash flows from investing activities:        
Capital expenditures   (170,881) (95,391) (145,422)
Proceeds from sale of property, plant and equipment   13,423 13,970 49,609
Cash paid for business acquisition   (3,000)    
Proceeds from sale of business       5,642
Net proceeds from the sale of Partnership units   289,908 109,365  
Net cash provided by (used) in continuing operations     27,944 (90,171)
Net cash provided by (used in) investing activities   129,450 27,944 (90,171)
Cash flows from financing activities:        
Capital contribution (distribution), net   183,030 (112,497) (211,617)
Borrowings (repayments) between subsidiaries, net   (138,704) 321,786 91,842
Net cash used in financing activities   44,326 209,289 (119,775)
Net increase (decrease) in cash and cash equivalents   1,234 (3,368) (29,045)
Cash and cash equivalents at end of period   2,820 1,586 4,954
Cash and cash equivalents at beginning of period   1,586 4,954 33,999
Other Subsidiaries [Member]
        
Cash flows from operating activities:        
Net cash provided by (used in) continuing operations   6,987 564,099 508,325
Net cash provided by discontinued operations   1,336 (3,880) 710
Net cash provided by operating activities   8,323 560,219 509,035
Cash flows from investing activities:        
Capital expenditures   (111,910) (140,599) (223,479)
Proceeds from sale of property, plant and equipment   32,835 17,225 19,488
Return of investments in non-consolidated affiliates       3,139
(Increase) decrease in restricted cash   820 12,930 (7,308)
Cash invested in non-consolidated affiliates   (471) (609) (1,959)
Net cash provided by (used) in continuing operations     (111,053) (210,119)
Net cash provided by (used in) discontinued operations     89,509 (710)
Net cash provided by (used in) investing activities   (78,726) (21,544) (210,829)
Cash flows from financing activities:        
Proceeds from borrowings of long-term debt   557,500 471,000 76,750
Repayments of long-term debt   (467,093) (1,018,561) (373,059)
Payments for debt issue costs   (1,157) (4,252) (4,882)
Distributions to noncontrolling partners in the Partnership   (39,870) (18,030) (15,459)
Borrowings (repayments) between subsidiaries, net   286 (2,832) 117
Net cash used in financing activities   49,666 (572,675) (316,533)
Effect of exchange rate changes on cash and equivalents   (3,007) (1,872) 7,325
Net increase (decrease) in cash and cash equivalents   (23,744) (35,872) (11,002)
Cash and cash equivalents at end of period   19,126 42,870 78,742
Cash and cash equivalents at beginning of period   42,870 78,742 89,744
Eliminations [Member]
        
Cash flows from investing activities:        
Return of investments in non-consolidated affiliates   397,386 (62,408) (422,232)
Net cash provided by (used) in continuing operations     (62,408) (422,232)
Net cash provided by (used in) investing activities   397,386 (62,408) (422,232)
Cash flows from financing activities:        
Capital contribution (distribution), net   (397,386) 62,408 422,232
Net cash used in financing activities   (397,386) 62,408 422,232
Cash and cash equivalents at end of period       0
Cash and cash equivalents at beginning of period     $ 0 $ 0