Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.8.0.1
Subsequent Events (Details)
$ in Thousands
 1 Months Ended 3 Months Ended
Feb. 28, 2018
USD ($)
Rate
Jan. 31, 2017
USD ($)
project
Dec. 31, 2016
USD ($)
Mar. 31, 2018
USD ($)
project
Subsequent Event [Line Items]        
Number of projects acquired | project   2    
Solar PV project        
Subsequent Event [Line Items]        
Number of projects acquired | project   2    
Payments to acquire businesses   $ 2,409 $ 3,575  
Subsequent Event | Interest Rate Swap        
Subsequent Event [Line Items]        
Derivative, notional amount, percentage of financing principal amount | Rate 60.00%      
Term of contract 2 years 6 months      
Fixed interest rate | Rate 2.455%      
Subsequent Event | Line of Credit        
Subsequent Event [Line Items]        
Proceeds from lines of credit $ 28,500      
Subsequent Event | Line of Credit | London Interbank Offered Rate (LIBOR)        
Subsequent Event [Line Items]        
Basis spread on variable rate | Rate 7.50%      
Subsequent Event | Solar PV project        
Subsequent Event [Line Items]        
Number of projects acquired | project       2
Total fair value of consideration       $ 55,000
Payments to acquire businesses       $ 21,000