Loans Receivable (excluding Covered Loans) (Loans on Non-accrual Status) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 114,717	$ 131,299	$ 163,116
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	100.00%	100.00%
Single-Family Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	89,075	100,460
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	77.50%	76.50%
Construction - Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	3,053	4,560
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.70%	3.50%
Construction - Custom [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	0	0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	0.00%
Land - Acquisition & Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	2,813	2,903
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.50%	2.20%
Land - Consumer Lot Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	3,548	3,337
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	3.10%	2.50%
Multi-Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	2,494	6,573
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.20%	5.00%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	11,613	11,736
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	10.10%	8.90%
Commercial & Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	655	477
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.60%	0.40%
HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	471	263
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.40%	0.20%
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 995	$ 990
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.90%	0.80%