Advances from Federal Home Loan Bank (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 2,840,000,000	$ 1,930,000,000
Line of Credit Facility, Remaining Borrowing Capacity	1,700,000,000	1,320,000,000
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]
Advances from Federal Home Loan Banks	1,146,103,000	605,330,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures [Abstract]
FHLB stock	95,300,000	97,500,000
Proceeds from Sale of Federal Reserve Bank Stock	4,000,000	6,500,000
FHLB of Seattle
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]
Amount, Due within 1 year	365,000,000	269,053,000
Amount, Due in 1 to 2 years	265,550,000	55,000,000
Amount, Due in 2 to 3 years	335,142,000	50,550,000
Amount, Due in 3 to 4 years	123,000,000	50,196,000
Amount, Due in 4 to 5 years	50,495,000	123,000,000
Amount, Due after 5 years	6,916,000	57,531,000
Advances from Federal Home Loan Banks	$ 1,146,103,000	$ 605,330,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures [Abstract]
Weighted Average Interest Rate, Due within 1 year	0.28%	0.96%
Weighted Average Interest Rate, Due in 1 to 2 years	0.51%	0.72%
Weighted Average Interest Rate, Due in 2 to 3 years	0.74%	0.64%
Weighted Average Interest Rate, Due in 3 to 4 years	1.45%	0.68%
Weighted Average Interest Rate, Due in 4 to 5 years	1.20%	1.45%
Weighted Average Interest Rate, Due after 5 years	7.00%	1.90%
Weighted Average Interest Rate	0.68%	1.07%