CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUE	$ 1,634,340	$ 1,580,519	$ 1,410,795
COST OF SERVICES	1,290,331	1,262,390	1,161,024
Gross profit	344,009	318,129	249,771
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	243,201	228,965	207,652
GOODWILL IMPAIRMENT			727
GAIN ON SALE OF ASSETS	(761)	(880)	(830)
Operating income	101,569	90,044	42,222
OTHER INCOME (EXPENSE):
Interest income	9	72	18
Interest expense	(2,345)	(1,753)	(1,858)
Changes in the fair value of contingent earn-out obligations	731	225	(245)
Other	1,097	76	91
Other income (expense)	(508)	(1,380)	(1,994)
INCOME BEFORE INCOME TAXES	101,061	88,664	40,228
INCOME TAX EXPENSE	36,165	31,224	11,614
INCOME FROM CONTINUING OPERATIONS	64,896	57,440	28,614
Loss from discontinued operations, net of income tax benefit of $—, $— and $10			(15)
NET INCOME INCLUDING NONCONTROLLING INTERESTS	64,896	57,440	28,599
Less: Net income attributable to noncontrolling interests		8,076	5,536
NET INCOME ATTRIBUTABLE TO COMFORT SYSTEMS USA, INC.	$ 64,896	$ 49,364	$ 23,063
Basic-
Income from continuing operations (in dollars per share)	$ 1.74	$ 1.32	$ 0.61
Net income (in dollars per share)	1.74	1.32	0.61
Diluted-
Income from continuing operations (in dollars per share)	1.72	1.30	0.61
Net income (in dollars per share)	$ 1.72	$ 1.30	$ 0.61
SHARES USED IN COMPUTING INCOME PER SHARE:
Basic (in shares)	37,335	37,442	37,547
Diluted (in shares)	37,811	37,868	37,797
DIVIDENDS PER SHARE (in dollars per share)	$ 0.275	$ 0.250	$ 0.225