Debt - Summary of Amendment to Senior Secured Revolving Credit Facility (Descriptors) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)
Senior Secured Notes [Line Items]
Amounts which can be increased to the credit facility, subject to lender approval.	$ 150,000,000
Minimum
Senior Secured Notes [Line Items]
Line of credit facility commitment fee, basis points	0.20%
Minimum | LIBOR
Senior Secured Notes [Line Items]
Line of credit, interest spread basis points	1.55%
Maximum
Senior Secured Notes [Line Items]
Line of credit facility commitment fee, basis points	0.30%
Maximum | LIBOR
Senior Secured Notes [Line Items]
Line of credit, interest spread basis points	2.30%