Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012
Collateral dependent impaired loans
Information about valuation method, inputs and assumptions for nonrecurring Level 3 fair value measurements
Fair value of assets	$ 11,097
Other real estate owned
Information about valuation method, inputs and assumptions for nonrecurring Level 3 fair value measurements
Fair value of assets	10,685
Private equity and alternative investments
Information about valuation method, inputs and assumptions for nonrecurring Level 3 fair value measurements
Fair value of assets	$ 3,455