Debt and Financing Arrangements (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Summary of Unsecured Credit Facility

Rates for the three months ended June 30, 2018 and 2017 were as follows:

	Six Months Ended
	June 30,
	2018	2017
Weighted average rates	3.03%	2.60%
Range of effective rates	2.37% - 5.00%	2.19% - 4.75%