Loans (Additional Information) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additional lending amount to customers whose loan terms has been modified in troubled debt restructuring	$ 0		$ 0
Carrying amount of consumer mortgage loans secured by residential real estate properties	148,000		288,000
Troubled Debt Restructuring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in allowance for loan losses	0	0
Charge-offs due to troubled debt restructurings	0	0
Troubled Debt Restructuring that Subsequently Defaulted
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in allowance for loan losses	0	0
Charge-offs due to troubled debt restructurings	0	0
Loans Purchased
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in allowance for loan losses	0	0
Loan losses reversed	$ 0	$ 0