Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Summary of Significant Accounting Policies

Schedule of disaggregation or revenue

	Three Months Ended March 31,
Revenue by Service Provided	2019				2018
HVAC and Plumbing	$	481,990	89.5	%	$	424,017	91.2	%
Building Automation Control Systems		29,014	5.4	%		20,045	4.3	%
Other		27,469	5.1	%		20,879	4.5	%
Total	$	538,473	100.0	%	$	464,941	100.0	%
	Three Months Ended March 31,
Revenue by Type of Customer	2019				2018
Industrial	$	168,660	31.3	%	$	100,100	21.5	%
Education		66,743	12.4	%		88,203	19.0	%
Office Buildings		66,212	12.3	%		69,120	14.9	%
Healthcare		92,023	17.1	%		63,183	13.6	%
Government		32,279	6.0	%		36,147	7.8	%
Retail, Restaurants and Entertainment		59,391	11.0	%		52,787	11.3	%
Multi-Family and Residential		30,235	5.6	%		33,052	7.1	%
Other		22,931	4.3	%		22,349	4.8	%
Total	$	538,473	100.0	%	$	464,941	100.0	%

	Three Months Ended March 31,
Revenue by Activity Type	2019				2018
New Construction	$	223,961	41.6	%	$	185,282	39.9	%
Existing Building Construction		182,296	33.8	%		156,758	33.7	%
Service Projects		50,384	9.4	%		42,433	9.1	%
Service Calls, Maintenance and Monitoring		81,833	15.2	%		80,468	17.3	%
Total	$	538,473	100.0	%	$	464,941	100.0	%

Schedule of contract assets and liabilities

	Three Months Ended				Year Ended
	March 31, 2019				December 31, 2018
	Contract		Contract		Contract		Contract
	Assets		Liabilities		Assets		Liabilities
Balance at beginning of period	$	10,213	$	130,986	$	30,116	$	106,005
Change due to acquisitions		27		44		2,833		8,195
Change due to conditional versus unconditional		(1,954)		—		6,244		—
Reclassified to unbilled accounts receivable		—		—		(28,980)		—
Change in timing for performance obligation to be satisfied		—		(10,740)		—		16,786
Balance at end of period	$	8,286	$	120,290	$	10,213	$	130,986

Schedule of lease asset and liabilities

The following table summarizes the lease asset and liabilities included in the consolidated balance sheet as follows (in thousands):

	March 31,
	2019
Lease right-of-use assets	$	70,316
Lease liabilities:
Other current liabilities		11,066
Long-term lease liabilities		62,028
Total lease liabilities	$	73,094

Schedule of maturities of lease liabilities

The maturities of lease liabilities are as follows (in thousands):

Year ending December 31—
2019 (excluding the three months ended March 31, 2019)	$	10,687
2020		12,508
2021		11,341
2022		9,410
2023		7,821
Thereafter		35,541
Total Lease Payments		87,308
Less—Present Value Discount		(14,214)
Present Value of Lease Liabilities	$	73,094

Schedule of supplemental information related to leases

Supplemental information related to leases was as follows (in thousands):

	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities	$	5,904
Lease right-of-use assets obtained in exchange for lease liabilities	$	174