Commitments and Contingencies (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014 properties	Jun. 30, 2013	Jun. 30, 2014 properties	Jun. 30, 2013	Dec. 31, 2013
Loss Contingencies [Line Items]
Litigation settlement other company owned stock	$ 4,400,000,000		$ 4,400,000,000
Number of non-cancelable operating leases	294		294
Rent expense	8,800,000	4,700,000	13,800,000	9,300,000
Rent income	94,000	192,000	271,000	448,000
Losses in connection with standby letters of credit	0	79,000		79,000
Standby letters of credit that expire thereafter	22,300,000		22,300,000
Standby letters of credit that expire within one year	42,000,000		42,000,000
Fair value of guarantee with standby letters of credit	1,475,219		1,475,219
Residential mortgage loan repurchase reserve liability	3,500,000		3,500,000
Concentration risk, percentage			80.00%		74.00%
Visa Inc [Member]
Loss Contingencies [Line Items]
Other company stock owned shares	483,806		483,806
Conversion ratio from Class B shares into Class A shares			42.06%
Value of the Class A shares	$ 210.71		$ 210.71
Unredeemed Class A equivalent shares owned			$ 42,900,000