Loans Receivable and Allowance for Loan Losses (Details 8) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing receivable, impaired
Unpaid Principal Balance	$ 292,378	$ 483,132
Recorded Investment	251,074	384,522
Related Allowance	(19,568)	(21,531)
Net Investment	231,506	362,991
Consumer and other loans | Home equity lines of credit
Financing receivable, impaired
Unpaid Principal Balance, Loans with an allowance recorded	5,607
Recorded Investment, Loans with an allowance recorded	5,323
Related Allowance	(3,882)
Net Investment, Loans with an allowance recorded	1,441
Mortgage loans | Residential | Full documentation interest-only loans
Financing receivable, impaired
Unpaid Principal Balance, Loans with an allowance recorded	62,967	142,659
Recorded Investment, Loans with an allowance recorded	53,351	109,877
Related Allowance	(2,339)	(6,019)
Net Investment, Loans with an allowance recorded	51,012	103,858
Mortgage loans | Residential | Full documentation amortizing loans
Financing receivable, impaired
Unpaid Principal Balance, Loans with an allowance recorded	32,725	41,136
Recorded Investment, Loans with an allowance recorded	30,784	36,091
Related Allowance	(1,065)	(2,458)
Net Investment, Loans with an allowance recorded	29,719	33,633
Mortgage loans | Residential | Reduced documentation interest-only loans
Financing receivable, impaired
Unpaid Principal Balance, Loans with an allowance recorded	94,276	183,280
Recorded Investment, Loans with an allowance recorded	79,733	140,357
Related Allowance	(3,721)	(7,673)
Net Investment, Loans with an allowance recorded	76,012	132,684
Mortgage loans | Residential | Reduced documentation amortizing loans
Financing receivable, impaired
Unpaid Principal Balance, Loans with an allowance recorded	14,208	30,660
Recorded Investment, Loans with an allowance recorded	13,170	25,605
Related Allowance	(728)	(2,202)
Net Investment, Loans with an allowance recorded	12,442	23,403
Mortgage loans | Multi-Family
Financing receivable, impaired
Unpaid Principal Balance, Loans with an allowance recorded	42,981	19,748
Unpaid Principal Balance, Loans without an allowance recorded	12,647	39,871
Recorded Investment, Loans with an allowance recorded	36,983	19,748
Recorded Investment, Loans without an allowance recorded	11,568	32,790
Related Allowance	(5,234)	(2,877)
Net Investment, Loans with an allowance recorded	31,749	16,871
Net Investment, Loans without an allowance recorded	11,568	32,790
Mortgage loans | Commercial Real Estate
Financing receivable, impaired
Unpaid Principal Balance, Loans with an allowance recorded	26,967	5,790
Unpaid Principal Balance, Loans without an allowance recorded		19,988
Recorded Investment, Loans with an allowance recorded	20,162	5,790
Recorded Investment, Loans without an allowance recorded		14,264
Related Allowance	(2,599)	(302)
Net Investment, Loans with an allowance recorded	17,563	5,488
Net Investment, Loans without an allowance recorded		$ 14,264