Quarterly report pursuant to Section 13 or 15(d)

Debt Instruments - Credit Facility (Details)

v3.5.0.2
Debt Instruments - Credit Facility (Details) - USD ($)
1 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Debt Instruments      
Credit facility   $ 90,000,000 $ 0
Line of credit      
Debt Instruments      
Maximum borrowings available $ 120,000,000.0 $ 120,000,000.0  
Credit facility $ 90,000,000.0    
Interest rate 3.81% 3.81%  
Available borrowing capacity $ 28,800,000 $ 28,800,000  
Letter of credit      
Debt Instruments      
Outstanding amount $ 1,200,000 $ 1,200,000