Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Credit Facility) (Narrative) (Details)

v3.4.0.3
Borrowings (Credit Facility) (Narrative) (Details) - Senior Secured Revolving Credit Facility [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Apr. 07, 2016
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 500,000  
Current borrowing capacity $ 300,000  
Interest rate at period end (as a percent) 2.36%  
Unused capacity, commitment fee (as a percent) 0.50%  
Debt instrument maturity date Mar. 11, 2019  
Subsequent Event [Member]    
Line of Credit Facility [Line Items]    
Current borrowing capacity   $ 300,000
Minimum [Member]    
Line of Credit Facility [Line Items]    
Debt instrument interest rate 1.75%  
Maximum [Member]    
Line of Credit Facility [Line Items]    
Debt instrument interest rate 2.75%