Quarterly report pursuant to Section 13 or 15(d)

Assets Held for Sale - Additional Information (Detail)

v2.4.0.8
Assets Held for Sale - Additional Information (Detail) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Dec. 31, 2012
Cheviot Project [Member]
Mar. 31, 2013
Cheviot Project [Member]
Long Lived Assets Held-for-sale [Line Items]          
Amount billed on customers       $ 56,800,000  
Contracts receivable   64,476,000 98,579,000 31,300,000 30,900,000
Provision for loss on contract receivable       14,500,000  
Fair value of assets held for sale   $ 13,500,000      
Percentage of fair value of assets held for sale under sales assistance agreement 50.00%