Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Shareholders' Equity

Summary of shares granted and vested

	2014			2013			2012
		Weighted			Weighted			Weighted
	Number	Average		Number	Average		Number	Average
	of	Grant Date		of	Grant Date		of	Grant Date
	Shares	Fair Value		Shares	Fair Value		Shares	Fair Value
Unvested shares, beginning of year	145,365	$	27.55	127,654	$	24.88	114,110	$	22.70
Shares granted	92,225		28.61	94,125		27.77	84,017		25.09
Shares vested	(87,398)		28.69	(75,889)		28.10	(69,213)		24.82
Shares repurchased or forfeited	—		—	(525)		26.61	(1,260)		24.03
Unvested shares, end of year	150,192	$	28.52	145,365	$	27.55	127,654	$	24.88