Debt and Financing Arrangements (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Summary of Unsecured Credit Facility

Rates for the three months ended March 31, 2018 and 2017 were as follows:

	Three Months Ended
	March 31,
	2018	2017
Weighted average rates	2.98%	2.52%
Range of effective rates	2.37% - 5.00%	2.19% - 4.50%