Financial Instruments with Off-Balance Sheet Risk (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Entity Information [Line Items]
Credit Extension Commitments	$ 1,110,057
Credit Extension Commitments, Beyond One Year	289,285
Standby Letters of Credit
Entity Information [Line Items]
Credit Extension Commitments	70,957
Unused Credit Card Lines
Entity Information [Line Items]
Credit Extension Commitments	$ 287,147