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Organization And Significant Accounting Policies (Supplemental Cash Flow Information) (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Interest paid, including interest capitalized $ 25,644 $ 29,968
Income tax payments (refunds), net 70 705
Non-cash investing and financing activities:    
Dividends and distributions payable 13,563 10,124
Conversions of redeemable common units 591 321
Common stock 401k matching contribution 639 655
Construction cost accruals, increase (decrease) 6,440 (3,332)
Adjustments to equity related to redeemable common units, net $ (737) $ (789)