Fair Values (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Recurring basis | Total
Assets and liabilities recorded at fair value
Derivative liabilities	$ 3,435	$ 2,373
Recurring basis | Quoted market prices in active markets (Level 1)
Assets and liabilities recorded at fair value
Derivative liabilities	0	0
Recurring basis | Significant other observable inputs (Level 2)
Assets and liabilities recorded at fair value
Derivative liabilities	3,435	2,373
Recurring basis | Significant unobservable inputs (Level 3)
Assets and liabilities recorded at fair value
Derivative liabilities	0	0
Non-recurring basis
Assets and liabilities recorded at fair value
Impaired real estate	31,597
Non-recurring basis | Total
Assets and liabilities recorded at fair value
Impaired loans	57,201	271,968
Impaired real estate		43,660
Non-recurring basis | Quoted market prices in active markets (Level 1)
Assets and liabilities recorded at fair value
Impaired loans	0	0
Impaired real estate	0	0
Non-recurring basis | Significant other observable inputs (Level 2)
Assets and liabilities recorded at fair value
Impaired loans	0	0
Impaired real estate	7,649	0
Non-recurring basis | Significant unobservable inputs (Level 3)
Assets and liabilities recorded at fair value
Impaired loans	57,201	271,968
Impaired real estate	$ 23,948	$ 43,660