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Fair Values (Schedule of Fair Value Measurement) (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($) Loan	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Loan	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) Loan
Assets and liabilities recorded at fair value
Payments to acquire available-for-sale securities			$ 4,400
Impairment of assets	$ 8,741	$ 3,916	11,753	$ 5,590
Recurring basis | Quoted market prices in active markets (Level 1)
Assets and liabilities recorded at fair value
Derivative assets	0		0		$ 0
Derivative liabilities	0		0		0
Available-for-sale securities	0		0		0
Recurring basis | Significant other observable inputs (Level 2)
Assets and liabilities recorded at fair value
Derivative assets	139		139		1,522
Derivative liabilities	768		768		131
Recurring basis | Significant unobservable inputs (Level 3)
Assets and liabilities recorded at fair value
Available-for-sale securities	5,780		5,780		1,161
Non-recurring basis | liquidation [Member] | Loans Receivable One
Assets and liabilities recorded at fair value
Impaired loans	$ 144,700		$ 144,700
Number of impaired loans | Loan	1		1
Non-recurring basis | comparable sales [Member] | Loans Receivable Two
Assets and liabilities recorded at fair value
Impaired loans	$ 30,200		$ 30,200
Closing costs as a percentage of sales price	4.00%		4.00%
Non-recurring basis | Discounted Cash Flow Valuation Technique | Loans Receivable Two
Assets and liabilities recorded at fair value
Impaired loans					$ 3,200
Number of impaired loans | Loan					1
Discount rate					14.30%
Non-recurring basis | Quoted market prices in active markets (Level 1)
Assets and liabilities recorded at fair value
Impaired loans	$ 0		$ 0		$ 0
Impaired land and development	0		0
Non-recurring basis | Significant unobservable inputs (Level 3)
Assets and liabilities recorded at fair value
Impaired loans	174,899		174,899		3,200
Fair Value | Recurring basis
Assets and liabilities recorded at fair value
Derivative assets	139		139		1,522
Derivative liabilities	768		768		131
Available-for-sale securities	5,780		5,780		1,161
Fair Value | Non-recurring basis
Assets and liabilities recorded at fair value
Impaired loans	$ 174,899		174,899		$ 3,200
Land
Assets and liabilities recorded at fair value
Impairment of assets			$ 3,800

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