CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 35,665	$ 51,237
Accounts receivable, less allowance for doubtful accounts of $7,097 and $5,341, respectively	268,839	267,060
Other receivables	7,113	6,527
Inventories	9,908	10,631
Prepaid expenses and other	27,434	24,664
Costs and estimated earnings in excess of billings	30,521	27,163
Total current assets	379,480	387,282
PROPERTY AND EQUIPMENT, NET	42,041	42,013
GOODWILL	114,588	107,093
IDENTIFIABLE INTANGIBLE ASSETS, NET	46,795	48,349
OTHER NONCURRENT ASSETS	8,822	6,329
Total assets	591,726	591,066
CURRENT LIABILITIES:
Current maturities of long-term debt	300	300
Current maturities of notes to former owners		332
Accounts payable	92,994	114,255
Accrued compensation and benefits	39,565	36,474
Billings in excess of costs and estimated earnings	70,798	71,730
Accrued self-insurance expense	28,650	27,408
Other current liabilities	31,022	27,472
Total current liabilities	263,329	277,971
LONG-TERM DEBT, NET OF CURRENT MATURITIES	16,100	2,400
NOTES TO FORMER OWNERS, NET OF CURRENT MATURITIES	7,949	12,349
DEFERRED INCOME TAX LIABILITIES	7,117	4,541
OTHER LONG-TERM LIABILITIES	12,912	10,699
Total liabilities	307,407	307,960
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, 3,820,660 and 3,714,506 shares, respectively	(40,452)	(39,437)
Additional paid-in capital	319,132	323,608
Retained earnings (deficit)	(10,879)	(19,991)
Comfort Systems USA, Inc. stockholders' equity	268,212	264,591
Noncontrolling interests	16,107	18,515
Total stockholders' equity	284,319	283,106
Total liabilities and stockholders' equity	$ 591,726	$ 591,066