Schedule of Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 0	$ 0	$ 0	$ 0
Valuation Allowances and Reserves, Charged to Cost and Expense	0	0	0
Valuation Allowances and Reserves, Deductions	0	0	0
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	(2,195,000)	(99,000)	(573,000)
Mortgage Loans On Real Estate, Impairment	2,300,000	0	0
Provision for Loan and Lease Losses	0	0	0
Loan Recoveries, Gross [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	$ 4,495,000