Schedule of Underlying Assets of Federal Home Loan Bank Advances (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 1,653,297
Available-for-sale Securities [Member]
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	1,355,320
Loans Held-for-sale, Mortgages [Member]
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	116,149
Retained Interest [Member]
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	181,578
Restricted Cash and Cash Equivalents [Member]
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 250