CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 45,305	$ 40,757
Accounts receivable, less allowance for doubtful accounts of $4,398 and $6,333, respectively	270,612	256,959
Other receivables	7,947	12,376
Inventories	9,336	9,638
Prepaid expenses and other	25,529	25,037
Costs and estimated earnings in excess of billings	30,200	26,204
Assets related to discontinued operations	297	1,582
Total current assets	389,226	372,553
PROPERTY AND EQUIPMENT, NET	44,943	41,416
GOODWILL	114,588	114,588
IDENTIFIABLE INTANGIBLE ASSETS, NET	39,107	44,515
OTHER NONCURRENT ASSETS	6,590	7,682
Total assets	594,454	580,754
CURRENT LIABILITIES:
Current maturities of long-term debt		300
Current maturities of notes to former owners	2,000
Accounts payable	95,667	100,641
Accrued compensation and benefits	44,185	36,892
Billings in excess of costs and estimated earnings	62,566	73,814
Accrued self-insurance expense	29,930	29,096
Other current liabilities	32,213	27,077
Liabilities related to discontinued operations	88	767
Total current liabilities	266,649	268,587
LONG-TERM DEBT, NET OF CURRENT MATURITIES	5,000	2,100
NOTES TO FORMER OWNERS, NET OF CURRENT MATURITIES		5,000
DEFERRED INCOME TAX LIABILITIES	8,596	7,954
OTHER LONG-TERM LIABILITIES	7,996	9,807
Total liabilities	288,241	293,448
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par, 5,000,000 shares authorized, none issued and outstanding
Common stock, $.01 par, 102,969,912 shares authorized, 41,123,365 and 41,123,365 shares issued, respectively	411	411
Treasury stock, at cost, 3,767,857 and 3,879,299 shares, respectively	(40,461)	(41,012)
Additional paid-in capital	317,184	317,534
Retained earnings (deficit)	11,230	(6,528)
Comfort Systems USA, Inc. stockholders' equity	288,364	270,405
Noncontrolling interests	17,849	16,901
Total stockholders' equity	306,213	287,306
Total liabilities and stockholders' equity	$ 594,454	$ 580,754