Construction Contracts - Net Position of Uncompleted Construction Contracts (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Contractor Contracts
Costs incurred on uncompleted construction contracts	$ 228,184	$ 195,219
Estimated earnings	9,739	8,501
Billings	(240,059)	(204,501)
Construction contract costs and estimated earnings in excess of billings	88	272
Billings in excess of construction contract costs and estimated earnings	(2,224)	(1,053)
Net position	$ (2,136)	$ (781)