Annual report pursuant to Section 13 and 15(d)

Contracts Receivable and Retainage - Additional Information (Detail)

v2.4.0.8
Contracts Receivable and Retainage - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Top 2 Customers [Member]
Customer
Long-term Contracts or Programs Disclosure [Line Items]      
Contract receivable $ 98,579 $ 60,535 $ 74,400
Number of major customers account for 75.45% of contract receivable     2
Percentage of contract receivable     75.45%
Reserve for bad debt $ 887 $ 14,508