Basis of Presentation and Significant Accounting Policies - Contract Receivables (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retainages	$ 85,587,000	$ 127,698,000
Less allowances	0	0
Accounts receivable-trade, net	225,459,000	381,858,000
Contract receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled	4,303,000	14,571,000
Less allowances	(29,094,000)	(30,404,000)
Accounts receivable-trade, net	225,459,000	381,858,000
Contract receivables [Member] | Contracts in progress [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts receivable	121,920,000	192,745,000
Contract receivables [Member] | Completed contracts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts receivable	$ 42,743,000	$ 77,248,000