Stock-Based Compensation Plans (Details 2) (Restricted Stock [Member], USD $)	9 Months Ended
	Sep. 30, 2014
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of Restricted Stock, Non-vested at December 31, 2013	47,500
Shares of Restricted Stock, Issued	24,400
Shares of Restricted Stock, Vested	0
Shares of Restricted Stock, Forfeited	0
Shares of Restricted Stock, Non-vested at September 30, 2014	71,900
Weighted Average Grant Date Fair Value, Non-vested at December 31, 2013	$ 25.86
Weighted Average Grant Date Fair Value, Issued	$ 27.04
Weighted Average Grant Date Fair Value, Vested	$ 0
Weighted Average Grant Date Fair Value, Forfeited	$ 0
Weighted Average Grant Date Fair Value, Non-vested at September 30, 2014	$ 26.26
Weighted Average Remaining Contractual Term (Years), Non-vested at September 30, 2014	2 years 9 months 18 days
Aggregate Intrinsic Value (in dollars), Non-vested at September 30, 2014	$ 1,805,000	[1]

[1] The aggregate intrinsic value of non-vested restricted stock was calculated using the market value of the Company's stock on September 30, 2014, the last trading day of the quarter, of $25.11 multiplied by the number of non-vested restricted shares outstanding.