Subsequent Events (Details)	0 Months Ended
	Jan. 29, 2015	Dec. 31, 2014	Jan. 09, 2015 sqft
Subsequent Event [Line Items]
Remaining authorized repurchase amount		1,050,000
Subsequent Event
Subsequent Event [Line Items]
Increase in authorized amount	4,000,000
Remaining authorized repurchase amount	1,100,000
Authorized shares to outstanding stock	8.00%
Building | Subsequent Event
Subsequent Event [Line Items]
Area of building			600,000