Loans Receivable - Nonaccrual Loans (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Reserve For Uncollected Loan Interest	$ 1,200	$ 900
Unpaid Principal Balance	32,672	30,956
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	28,173	22,267
Loans Past Due Over 90 Days, still accruing	234	329
One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	5,113	7,286
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	4,161	6,154
Loans Past Due Over 90 Days, still accruing	0	70
One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	1,543	1,420
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	1,341	1,145
Loans Past Due Over 90 Days, still accruing	0	0
Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	12,586	5,246
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	11,788	3,517
Loans Past Due Over 90 Days, still accruing	234	242
Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	656
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	656
Nonresidential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	8,185	12,249
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	7,565	8,985
Loans Past Due Over 90 Days, still accruing	0	0
Land loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	2,953	3,817
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	1,609	2,210
Loans Past Due Over 90 Days, still accruing	0	0
Commercial loans - secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	1,115	386
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	906	204
Loans Past Due Over 90 Days, still accruing	0	0
Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	520	552
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	146	52
Loans Past Due Over 90 Days, still accruing	0	17
Consumer loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	1
Recorded investment in nonaccrual and loans past due over 90 days
Recorded Investment	1
Loans Past Due Over 90 Days, still accruing	$ 0