Commitments and Contingencies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 loan properties	Dec. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Number of non-cancelable operating leases	155
Rent expense	$ 19,100,000	$ 17,300,000	$ 16,600,000
Rent income	785,000	1,000,000	1,000,000
Recoveries in connection with standby letters of credit	116,000
Losses in connection with standby letters of credit	78,000	2,200,000	110,000
Standby letters of credit that expire thereafter	18,000,000
Standby letters of credit that expire within one year	40,800,000
Fair value of guarantee with standby letters of credit	183,000
Number of loans repurchased due to deficiencies in underwriting or loan documentation	20
Litigation settlement other company owned stock	4,400,000,000
Concentration risk, percentage	74.00%	79.00%
Visa Inc [Member]
Loss Contingencies [Line Items]
Other company stock owned shares	468,659
Conversion ratio from Class B shares into Class A shares	0.4206
Value of the Class A shares	$ 222.68
Unredeemed Class A equivalent shares owned	$ 43,900,000