Significant Accounting Policies (Details)	6 Months Ended
	Jun. 30, 2017
Significant Accounting Policies [Line Items]
Required Distribution of Taxable Net Income, Percentage on Annual Basis	90.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Maximum [Member]
Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	2 years