CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net Income	$ 76,226	$ 46,964
Adjustments:
Depreciation and amortization	189,364	179,392
Gain on fuel call options		(2,681)
Changes in operating assets and liabilities:
Decrease in trade and other receivables, net	2,257	21,069
Decrease (increase) in inventories	152	(3,141)
Increase in prepaid expenses and other assets	(19,990)	(30,612)
Decrease in accounts payable	(13,043)	(14,263)
Decrease in accrued interest	(2,528)	(22,294)
Decrease in accrued expenses and other liabilities	(45,953)	(21,938)
Increase in customer deposits	55,751	77,360
Other, net	(979)	(14,641)
Net cash provided by operating activities	241,257	215,215
Investing Activities
Purchases of property and equipment	(178,376)	(177,235)
Cash (paid) received on settlement of derivative financial instruments	(8,747)	8,027
Equity contribution to unconsolidated affiliate	(19,487)
Cash payments received on loan to unconsolidated affiliate	11,993	11,813
Other, net	1,104	(1,048)
Net cash used in investing activities	(193,513)	(158,443)
Financing Activities
Debt proceeds	120,000	145,000
Debt issuance costs	(15,516)	(16,260)
Repayments of debt	(106,137)	(131,810)
Dividends paid	(27,735)	(43,506)
Proceeds from exercise of common stock options	3,339	1,557
Other, net	377	424
Net cash used in financing activities	(25,672)	(44,595)
Effect of exchange rate changes on cash	(1,039)	3,170
Net increase in cash and cash equivalents	21,033	15,347
Cash and cash equivalents at beginning of period	194,855	262,186
Cash and cash equivalents at end of period	215,888	277,533
Cash paid during the period for:
Interest, net of amount capitalized	88,229	101,065
Non cash Investing Activities
Purchases of property and equipment through asset trade in	$ 46,375