Quarterly report pursuant to Section 13 or 15(d)

Debt Instruments - Credit Facility (Details)

v3.8.0.1
Debt Instruments - Credit Facility (Details) - USD ($)
1 Months Ended
Sep. 30, 2016
Sep. 30, 2017
Debt Instruments    
Outstanding borrowings   $ 0
Line of credit    
Debt Instruments    
Maximum borrowings available   120,000,000.0
Credit facility $ 90,000,000.0  
Available borrowing capacity   118,800,000
Letter of credit    
Debt Instruments    
Outstanding amount   $ 1,200,000