Loans Receivable and Allowance for Loan Losses (Schedule of Troubled Debt Restructurings Subsequently Defaulted) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 SecurityLoan	Mar. 31, 2014 SecurityLoan
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans	0	1
Outstanding Recorded Investment	$ 0	$ 90
Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans	0	1
Outstanding Recorded Investment	0	90
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans	0	3
Outstanding Recorded Investment	0	1,647
Total Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans	0	4
Outstanding Recorded Investment	$ 0	$ 1,737