Commitments and Contingencies - Additional Information (Detail) (USD $)					1 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Colorado	Jun. 30, 2013 Colorado Before Amendment	Jun. 30, 2013 Colorado After Amendment	Jul. 15, 2010 Schwab Plaintiff	Oct. 15, 2010 Minimum FHLB Chicago Plaintiff	Jun. 30, 2013 Maximum	Jun. 30, 2012 Maximum	Jun. 30, 2013 Sequoia FHLB Seattle Residential	Jun. 30, 2013 Sequoia Schwab Residential	Jun. 30, 2013 Sequoia FHLB Chicago Residential	Jun. 30, 2013 Sequoia FHLB Chicago First Notice Residential	Jun. 30, 2013 Sequoia FHLB Chicago Second Notice Residential
Loss Contingencies [Line Items]
Future Lease Commitments with expiration date	$ 12,122,000		$ 1,900,000	$ 2,000,000
Operating lease expiration dates							2021
2013 rent obligation for leases in Denver-based operations	975,000	88,000
Operating lease expense							1,000,000	1,000,000
Unamortized leasehold improvement	12,000
Statutory interest rate per annum									8.00%		10.00%
Original principal amount of securities									133,000,000	14,800,000		105,000,000	379,000,000
Debt instrument principal payment amount									113,000,000
Debt instrument interest payment amount									11,000,000
Number of other named defendants along with SRF					26	45
Principal balance of securities										12,600,000		70,300,000	251,800,000
Debt instrument interest amount										$ 1,300,000		$ 23,800,000	$ 79,900,000