Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2018

Revenue Recognition [Abstract]

Disaggregation of Revenue [Table Text Block]

The following tables disaggregate our revenue for the three and six months ended June 30, 2018 by major sources:

Three Months Ended June 30, 2018	Utility		Residential and Commercial		All Other			Consolidated
Type of service:
Tree and plant care	$	97,118	$	86,540	$	(26	)	$	183,632
Grounds maintenance	—		37,786		—			37,786
Storm damage services	621		911		—			1,532
Consulting and other	30,757		16,228		714			47,699
Total revenues	$	128,496	$	141,465	$	688		$	270,649
Geography:
United States	$	118,661	$	129,905	$	688		$	249,254
Canada	9,835		11,560		—			21,395
Total revenues	$	128,496	$	141,465	$	688		$	270,649

M. Revenue Recognition (continued)

Six Months Ended June 30, 2018	Utility		Residential and Commercial		All Other			Consolidated
Type of service:
Tree and plant care	$	183,435	$	142,937	$	(12	)	$	326,360
Grounds maintenance	—		60,588		—			60,588
Storm damage services	3,834		1,810		—			5,644
Consulting and other	59,914		25,475		1,319			86,708
Total revenues	$	247,183	$	230,810	$	1,307		$	479,300
Geography:
United States	$	229,114	$	212,383	$	1,307		$	442,804
Canada	18,069		18,427		—			36,496
Total revenues	$	247,183	$	230,810	$	1,307		$	479,300

Contract with Customer, Asset and Liability [Table Text Block]

Net contract liabilities consisted of the following:

	June 30, 2018		December 31, 2017
Contract liabilities - current	$	3,847	$	2,072
Contract liabilities - noncurrent	2,080		2,020
Net contract liabilities	$	5,927	$	4,092