Financial Instruments with Off-Balance Sheet Risk (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Entity Information [Line Items]
Credit Extension Commitments	$ 1,225,762
Credit Extension Commitments, Beyond One Year	279,752
Standby Letters of Credit
Entity Information [Line Items]
Credit Extension Commitments	47,338
Unused Credit Card Lines
Entity Information [Line Items]
Credit Extension Commitments	$ 382,263