Stock-Based Compensation Plans (Details 2) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of Restricted Stock, Non-vested at December 31, 2014	54,050
Shares of Restricted Stock, Issued	21,900
Shares of Restricted Stock, Vested	(6,050)
Shares of Restricted Stock, Forfeited	0
Shares of Restricted Stock, Non-vested at June 30, 2015	69,900
Weighted Average Grant Date Fair Value, Non-vested at December 31, 2014 | $ / shares	$ 26.58
Weighted Average Grant Date Fair Value, Issued | $ / shares	25.64
Weighted Average Grant Date Fair Value, Vested | $ / shares	27.04
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	0
Weighted Average Grant Date Fair Value, Non-vested at June 30, 2015 | $ / shares	$ 26.25
Weighted Average Remaining Contractual Term (Years), Non-vested at June 30, 2015	2 years 7 months 6 days
Aggregate Intrinsic Value (in dollars), Non-vested at June 30, 2015 | $	$ 1,890,000	[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, 2015, the last trading day of the quarter, of $27.04 multiplied by the number of non-vested restricted shares outstanding.