Deposits (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest expense on deposits [Abstract]
Transaction deposits	$ 11,155,000	$ 14,300,000	$ 23,415,000
Savings	442,000	540,000	719,000
Time Deposit, Interest Expense [Abstract]
Certificates of deposits under $100,000	16,234,000	19,150,000	26,476,000
Certificates of deposits $100,000 and over	12,273,000	16,331,000	21,175,000
Other time deposits	15,460,000	16,692,000	17,105,000
Total time	43,967,000	52,173,000	64,756,000
Total	55,564,000	67,013,000	88,890,000
Time Deposits [Abstract]
Time Deposits, $100,000 or More, Domestic	1,800,000,000	1,900,000,000
Time Deposit Maturities [Abstract]
2014	1,200,000,000
2015	456,000,000
2016	329,000,000
2017	167,000,000
2018	204,000,000
Thereafter	309,000,000
Fixed rate, brokered certificates of deposits	186,000,000	187,000,000
Weighted-average interest rate paid on fixed rate, brokered certificates of deposits (in hundredths)	2.96%	3.17%
Other Deposits Information [Abstract]
Overdrawn transaction deposits reclassified as loan balances	$ 37,000,000	$ 9,200,000