XML 45 R35.htm IDEA: XBRL DOCUMENT v3.7.0.1
Debt Obligations (Details) - USD ($)
Apr. 19, 2016
Mar. 31, 2017
Dec. 31, 2016
Line of Credit Facility [Line Items]      
Revolving credit facility borrowings   $ 125,000,000 $ 100,000,000
Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Line of credit, term 3 years    
Line of credit, borrowing capacity $ 200,000,000    
Line of credit, commitment fee rate 0.35%    
Revolving credit facility borrowings   $ 125,000,000  
Weighted average interest during period   2.96%