Construction Contracts in Progress - Summary of Contracts in Progress (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Summary of Contracts in Progress [Abstract]
Costs incurred on uncompleted contracts	$ 94,686	$ 92,190
Estimated earnings	52,246	47,510
Earned revenue	146,932	139,700
Less billings to date	(141,478)	(132,790)
Total	5,454	6,910
Classified as follows:
Costs and estimated earnings in excess of billings on uncompleted contracts	7,312	9,904
Billings in excess of costs and estimated earnings on uncompleted contracts	$ (1,858)	$ (2,994)