Loans - Covered Loans Thirty to Eighty Nine Days, Ninety Days or More Past Due (Details) (Covered Loans, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 90 days or more past due	$ 152,781	$ 211,485
Loans 30-89 Days Past Due	48,976	57,929
One-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 90 days or more past due	144,881	201,425
Loans 30-89 Days Past Due	45,045	52,250
Other loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 90 days or more past due	7,900	10,060
Loans 30-89 Days Past Due	$ 3,931	$ 5,679