Significant Accounting Policies (Details)	9 Months Ended
	Sep. 30, 2018
Significant Accounting Policies [Line Items]
Number of days to determine non-performance of loan	90 days
Long-Term Incentive Plan Units [Member] | Director [Member]
Significant Accounting Policies [Line Items]
Vesting period	1 year
Minimum [Member] | Long-Term Incentive Plan Units [Member] | Dedicated or partially dedicated personnel [Member]
Significant Accounting Policies [Line Items]
Vesting period	1 year
Maximum [Member] | Long-Term Incentive Plan Units [Member] | Dedicated or partially dedicated personnel [Member]
Significant Accounting Policies [Line Items]
Vesting period	2 years