CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
REVENUE	$ 354,750	$ 312,148	$ 684,160	$ 594,207
COST OF SERVICES	300,238	264,638	586,904	512,488
Gross profit	54,512	47,510	97,256	81,719
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	47,090	41,928	93,453	84,550
GAIN ON SALE OF ASSETS	(239)	(19)	(455)	(104)
Operating income (loss)	7,661	5,601	4,258	(2,727)
OTHER INCOME (EXPENSE):
Interest income	4	23	8	49
Interest expense	(428)	(466)	(825)	(953)
Changes in the fair value of contingent earn-out obligations	(37)	584	(67)	489
Other	18	(67)	70	(52)
Other income (expense)	(443)	74	(814)	(467)
INCOME (LOSS) BEFORE INCOME TAXES	7,218	5,675	3,444	(3,194)
INCOME TAX EXPENSE (BENEFIT)	3,171	2,513	2,065	(1,186)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTERESTS	4,047	3,162	1,379	(2,008)
Less: Net loss attributable to noncontrolling interests	(421)		(2,060)
NET INCOME (LOSS) ATTRIBUTABLE TO COMFORT SYSTEMS USA, INC.	$ 4,468	$ 3,162	$ 3,439	$ (2,008)
INCOME (LOSS) PER SHARE ATTRIBUTABLE TO COMFORT SYSTEMS USA, INC.:
Basic (in dollars per share)	$ 0.12	$ 0.08	$ 0.09	$ (0.05)
Diluted (in dollars per share)	$ 0.12	$ 0.08	$ 0.09	$ (0.05)
SHARES USED IN COMPUTING INCOME (LOSS) PER SHARE:
Basic (in shares)	37,166	37,630	37,111	37,584
Diluted (in shares)	37,247	37,742	37,232	37,584
DIVIDENDS PER SHARE (in dollars per share)	$ 0.05	$ 0.05	$ 0.10	$ 0.10