Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Senior secured revolving credit facility ) (Details)

v2.4.0.8
Borrowings (Senior secured revolving credit facility ) (Details) (Senior Secured Revolving Credit Facility [Member], USD $)
In Thousands, unless otherwise specified
9 Months Ended 9 Months Ended
Sep. 30, 2014
Mar. 11, 2014
Dec. 31, 2013
Oct. 08, 2014
Subsequent Event [Member]
Sep. 30, 2014
Minimum [Member]
Sep. 30, 2014
Maximum [Member]
Line of Credit Facility [Line Items]            
Maximum borrowing capacity   $ 500,000        
Current borrowing capacity 155,000     250,000    
Credit Facility $ 20,000   $ 22,000      
Interest rate at period end (as a percent) 2.43%          
Basis Spread on LIBOR (as a percent)         1.75% 2.75%
Unused capacity, commitment fee (as a percent) 0.50%