Junior Subordinated Debt Securities Payable (Schedule Of Interest Expense Incurred In Connection With Junior Subordinated Debt Securities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Junior Subordinated Debt Securities Payable [Abstract]
Interest expense incurred	$ 20,454	$ 20,454	$ 20,454