Adjustments to Condensed Consolidating Balance Sheet included within Guarantor Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net	$ 295,290	$ 297,976
Investments in affiliates	1,715	2,066
Other assets	70,095	61,863
Total assets	4,209,007	3,733,687	3,924,103
Accounts payable	71,967	75,165
Other liabilities	48,506	59,771
Total liabilities	2,292,991	1,952,150
Total common shareholders’ equity	1,913,527	1,778,950
Total equity	1,916,016	1,781,537	1,982,783	1,787,278
Total liabilities and equity	4,209,007	3,733,687
Consolidation, Eliminations
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net	3,472	3,164
Accounts receivable from consolidated subsidiaries	(2,880,648)	(3,135,161)
Investments in affiliates	(6,987,772)	(6,614,936)
Note receivable and other amounts due from consolidated subsidiaries	(1,936,618)	(1,334,833)
Total assets	(11,856,688)	(11,164,385)
Accounts payable to consolidated subsidiaries	(2,880,648)	(3,135,161)
Notes payable and other amounts due to consolidated subsidiaries	(1,940,100)	(1,337,563)
Total liabilities	(4,860,161)	(4,539,449)
Total common shareholders’ equity	(6,996,527)	(6,624,936)
Total equity	(6,996,527)	(6,624,936)
Total liabilities and equity	(11,856,688)	(11,164,385)
Scenario, Adjustment | Consolidation, Eliminations
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net		993,224
Accounts receivable from consolidated subsidiaries		(3,135,161)
Investments in affiliates		(87,855)
Note receivable and other amounts due from consolidated subsidiaries		(1,334,833)
Other assets		3,399,522
Total assets		(165,103)
Accounts payable		993,224
Accounts payable to consolidated subsidiaries		(3,135,161)
Notes payable and other amounts due to consolidated subsidiaries		(1,337,563)
Other liabilities		3,402,252
Total liabilities		(77,248)
Total common shareholders’ equity		(87,855)
Total equity		(87,855)
Total liabilities and equity		(165,103)
Parent Company
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net	1,822	2,147
Accounts receivable from consolidated subsidiaries	42,865	422,058
Investments in affiliates	5,489,676	5,226,567
Note receivable and other amounts due from consolidated subsidiaries	1,049,344	529,913
Other assets	24,574	33,937
Total assets	6,765,670	6,385,219
Accounts payable	2,194	3,366
Accounts payable to consolidated subsidiaries	2,644,296	2,563,602
Notes payable and other amounts due to consolidated subsidiaries	785,476	878,148
Other liabilities	19,884	22,503
Total liabilities	4,852,143	4,606,269
Total common shareholders’ equity	1,913,527	1,778,950
Total equity	1,913,527	1,778,950
Total liabilities and equity	6,765,670	6,385,219
Parent Company | Scenario, Adjustment
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable from consolidated subsidiaries		422,058
Note receivable and other amounts due from consolidated subsidiaries		529,913
Total assets		951,971
Accounts payable		(77,129)
Accounts payable to consolidated subsidiaries		2,563,602
Notes payable and other amounts due to consolidated subsidiaries		878,148
Other liabilities		(2,412,650)
Total liabilities		951,971
Total liabilities and equity		951,971
Guarantor Subsidiaries
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net	10,948	10,523
Accounts receivable from consolidated subsidiaries	2,623,314	2,520,933
Investments in affiliates	1,478,429	1,369,056
Note receivable and other amounts due from consolidated subsidiaries	873,105	804,843
Other assets	7,447	8,096
Total assets	7,200,122	6,601,573
Accounts payable	45,802	44,468
Accounts payable to consolidated subsidiaries	147,957	512,145
Notes payable and other amounts due to consolidated subsidiaries	957,451	275,674
Other liabilities	16,221	27,720
Total liabilities	1,769,263	1,409,568
Total common shareholders’ equity	5,430,859	5,192,005
Total equity	5,430,859	5,192,005
Total liabilities and equity	7,200,122	6,601,573
Guarantor Subsidiaries | Scenario, Adjustment
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net		(763,757)
Accounts receivable from consolidated subsidiaries		2,520,933
Investments in affiliates		87,855
Note receivable and other amounts due from consolidated subsidiaries		804,843
Other assets		(2,699,168)
Total assets		(49,294)
Accounts payable		(829,286)
Accounts payable to consolidated subsidiaries		512,145
Notes payable and other amounts due to consolidated subsidiaries		275,674
Other liabilities		(7,827)
Total liabilities		(49,294)
Total liabilities and equity		(49,294)
Non-Guarantor Subsidiaries
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net	279,048	282,142
Accounts receivable from consolidated subsidiaries	214,469	192,170
Investments in affiliates	21,382	21,379
Note receivable and other amounts due from consolidated subsidiaries	14,169	77
Other assets	38,074	19,830
Total assets	2,099,903	1,911,280
Accounts payable	23,971	27,331
Accounts payable to consolidated subsidiaries	88,395	59,414
Notes payable and other amounts due to consolidated subsidiaries	197,173	183,741
Other liabilities	12,401	9,548
Total liabilities	531,746	475,762
Total common shareholders’ equity	1,565,668	1,432,931
Total equity	1,568,157	1,435,518
Total liabilities and equity	2,099,903	1,911,280
Non-Guarantor Subsidiaries | Scenario, Adjustment
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net		(229,467)
Accounts receivable from consolidated subsidiaries		192,170
Note receivable and other amounts due from consolidated subsidiaries		77
Other assets		(700,354)
Total assets		(737,574)
Accounts payable		(86,809)
Accounts payable to consolidated subsidiaries		59,414
Notes payable and other amounts due to consolidated subsidiaries		183,741
Other liabilities		(981,775)
Total liabilities		(825,429)
Total common shareholders’ equity		87,855
Total equity		87,855
Total liabilities and equity		$ (737,574)