CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUE	$ 325,890	$ 326,902
COST OF SERVICES	274,423	283,971
Gross profit	51,467	42,931
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	46,520	46,051
GAIN ON SALE OF ASSETS	(139)	(117)
Operating income (loss)	5,086	(3,003)
OTHER INCOME (EXPENSE):
Interest income	7	4
Interest expense	(338)	(397)
Changes in the fair value of contingent earn-out obligations	(27)	(30)
Other	64	51
Other income (expense)	(294)	(372)
INCOME (LOSS) BEFORE INCOME TAXES	4,792	(3,375)
INCOME TAX EXPENSE (BENEFIT)	2,043	(944)
INCOME (LOSS) FROM CONTINUING OPERATIONS	2,749	(2,431)
Loss from discontinued operations, net of income tax benefit of $39 and $162	(54)	(237)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTERESTS	2,695	(2,668)
Less: Net income (loss) attributable to noncontrolling interests	163	(1,639)
NET INCOME (LOSS) ATTRIBUTABLE TO COMFORT SYSTEMS USA, INC.	$ 2,532	$ (1,029)
Basic-
Income (loss) from continuing operations (in dollars per share)	$ 0.07	$ (0.02)
Income (loss) from discontinued operations (in dollars per share)		$ (0.01)
Net income (loss) (in dollars per share)	$ 0.07	$ (0.03)
Diluted-
Income (loss) from continuing operations (in dollars per share)	$ 0.07	$ (0.02)
Income (loss) from discontinued operations (in dollars per share)		$ (0.01)
Net income (loss) (in dollars per share)	$ 0.07	$ (0.03)
SHARES USED IN COMPUTING INCOME (LOSS) PER SHARE:
Basic (in shares)	37,067	37,056
Diluted (in shares)	37,333	37,056
DIVIDENDS PER SHARE (in dollars per share)	$ 0.05	$ 0.05