Subsequent Events (Details)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 11, 2015
Subsequent Event [Line Items]
Share-based award vesting period	6 years
Restricted Stock [Member]
Subsequent Event [Line Items]
Share-based equity award grant	44,322	84,451	52,545
Restricted Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Share-based equity award grant				40,507
Performance Shares [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Share-based equity award grant				44,962
Minimum [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Share-based award vesting period				3 years 0 months 0 days
Minimum [Member] | Restricted Stock [Member]
Subsequent Event [Line Items]
Share-based award vesting period	3 years
Maximum [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Share-based award vesting period				5 years 0 months 0 days
Maximum [Member] | Restricted Stock [Member]
Subsequent Event [Line Items]
Share-based award vesting period	5 years