Other Income (Expense) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended							12 Months Ended			15 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Mar. 31, 2011	Mar. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Sep. 30, 2012
Other Income and Expenses [Abstract]
Gain on legal settlements, net (Note 21)	$ 19,000								$ 20,895	$ 0	$ 24,500
Loss on disposition of land division (Note 15)									0	0	(38,115)
Fair value adjustment of warrant (Note 15)								12,800	0	0	12,788
Write-down of investments (Note 19)									(556)	(1,312)	(7,650)
Other income (expense)									(3,215)	(2,135)	228
Total other income (expense)		$ 17,851	$ (936)	$ 895	$ (686)	$ 497	$ (2,999)		$ 17,124	$ (3,447)	$ (8,249)	$ (1,144)	$ 199