CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 215,888	$ 194,855
Trade and other receivables, net	308,030	281,421
Inventories	145,922	146,295
Prepaid expenses and other assets	236,954	207,662
Derivative financial instruments	51,820	57,827
Total current assets	958,614	888,060
Property and equipment, net	17,473,793	17,451,034
Goodwill	429,198	432,975
Other assets	1,004,496	1,055,861
Total assets	19,866,101	19,827,930
Current liabilities
Current portion of long-term debt	2,491,064	1,519,483
Accounts payable	337,441	351,587
Accrued interest	103,838	106,366
Accrued expenses and other liabilities	493,788	541,722
Customer deposits	1,634,373	1,546,993
Total current liabilities	5,060,504	4,066,151
Long-term debt	5,975,890	6,970,464
Other long-term liabilities	491,172	482,566
Commitments and contingencies (Note 7)
Shareholders' equity
Preferred stock ($0.01 par value; 20,000,000 shares authorized; none outstanding)
Common stock ($0.01 par value; 500,000,000 shares authorized; 229,705,743 and 229,080,109 shares issued, March 31, 2013 and December 31, 2012, respectively)	2,297	2,291
Paid-in capital	3,117,135	3,109,887
Retained earnings	5,794,167	5,744,791
Accumulated other comprehensive loss	(161,360)	(134,516)
Treasury stock (10,308,683 common shares at cost, March 31, 2013 and December 31, 2012)	(413,704)	(413,704)
Total shareholders' equity	8,338,535	8,308,749
Total liabilities and shareholders' equity	$ 19,866,101	$ 19,827,930