Other Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2011
Other Income and Expenses [Abstract]
Other income - termination fee	$ 66,744	$ 35,000	$ 0	$ 0	$ 101,744