Financing Agreements - Schedule of Revolving Facility Margins and Fees (Details) - Revolving Facility [Member]	3 Months Ended
	Mar. 31, 2018
Less than or equal to 1.00:1.00 [Member]
Debt Instrument [Line Items]
Unused capacity, Commitment fee rate	0.25%
Greater than 1.00:1.00 but less than or equal to 2.00:1.00 [Member]
Debt Instrument [Line Items]
Unused capacity, Commitment fee rate	0.375%
Greater than 2.00:1.00 [Member]
Debt Instrument [Line Items]
Unused capacity, Commitment fee rate	0.50%
Base Rate [Member] | Less than or equal to 1.00:1.00 [Member]
Debt Instrument [Line Items]
Margin rate	0.50%
Base Rate [Member] | Greater than 1.00:1.00 but less than or equal to 2.00:1.00 [Member]
Debt Instrument [Line Items]
Margin rate	0.75%
Base Rate [Member] | Greater than 2.00:1.00 [Member]
Debt Instrument [Line Items]
Margin rate	1.00%
Eurodollar Rate [Member] | Less than or equal to 1.00:1.00 [Member]
Debt Instrument [Line Items]
Margin rate	1.50%
Eurodollar Rate [Member] | Greater than 1.00:1.00 but less than or equal to 2.00:1.00 [Member]
Debt Instrument [Line Items]
Margin rate	1.75%
Eurodollar Rate [Member] | Greater than 2.00:1.00 [Member]
Debt Instrument [Line Items]
Margin rate	2.00%