Commitments and Contingencies (Details) $ in Thousands	Jan. 25, 2016 USD ($) a	May 31, 2016 USD ($)	May 04, 2016 USD ($) a	Mar. 23, 2016 USD ($) a	Aug. 31, 2014 USD ($) a
Commitments and Contingencies
Common stock repurchase program, remaining authorized amount		$ 3,049
Purchase agreement
Commitments and Contingencies
Purchase obligations			$ 1,900	$ 6,200
Number of acres | a			14	31
Undeveloped land
Commitments and Contingencies
Number of acres | a					45
Undeveloped land | Agreement to sell
Commitments and Contingencies
Purchase obligations	$ 7,700
Number Of Acres To Be Sold | a					30
Number of acres | a	280
Agreement Term of Extension	3 years
Undeveloped land | Agreement to sell | Minimum
Commitments and Contingencies
Sale Price of Land					$ 3,250
Property and inventory purchase commitments
Commitments and Contingencies
Purchase obligations		$ 1,871