Financial Instruments with Off-Balance Sheet Risk (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Entity Information [Line Items]
Credit Extension Commitments	$ 1,488,996
Credit Extension Commitments, Beyond One Year	361,132
Standby Letters of Credit
Entity Information [Line Items]
Credit Extension Commitments	64,752
Unused Credit Card Lines
Entity Information [Line Items]
Credit Extension Commitments	$ 490,749