CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable, net	$ 32,183	$ 34,150
Cash and cash equivalents	47,547	247,673
Other assets, net	776,853	788,520
Other debt	78,836	81,958
Accounts payable and accrued liabilities	238,583	293,994
Deferred revenue	64,866	68,055
Accounts receivable, allowance (in dollars)	1,632	1,668
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	454,416,748	453,191,321
Common stock, shares outstanding	454,416,748	453,191,321
VIEs
Accounts receivable, net	2,000	2,000
Cash and cash equivalents	10,000	10,000
Other assets, net	3,000	2,000
Other debt	200	200
Accounts payable and accrued liabilities	15,000	14,000
Deferred revenue	$ 2,000	$ 2,000