Summary of Accounting Policies Results of Operations for Acquisitions (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Acquisition results [Table Text Block]

For the quarter ended March 31, 2019, these acquisitions generated the following operating revenue and income:

	Three Months Ended March 31, 2019
	Operating Revenue		Operating Income
(in thousands)
Marlin Gas Services	$	2,434	$	1,375
Ohl	$	822	$	273