CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 27,873	$ 51,237
Accounts receivable, less allowance for doubtful accounts of $5,762 and $5,341, respectively	265,941	267,060
Other receivables	6,261	6,527
Inventories	10,699	10,631
Prepaid expenses and other	29,179	24,664
Costs and estimated earnings in excess of billings	33,572	27,163
Total current assets	373,525	387,282
PROPERTY AND EQUIPMENT, NET	40,807	42,013
GOODWILL	107,093	107,093
IDENTIFIABLE INTANGIBLE ASSETS, NET	46,284	48,349
OTHER NONCURRENT ASSETS	8,349	6,329
Total assets	576,058	591,066
CURRENT LIABILITIES:
Current maturities of long-term debt	300	300
Current maturities of notes to former owners	332	332
Accounts payable	105,801	114,255
Accrued compensation and benefits	36,025	36,474
Billings in excess of costs and estimated earnings	70,109	71,730
Accrued self-insurance expense	28,277	27,408
Other current liabilities	25,397	27,472
Total current liabilities	266,241	277,971
LONG-TERM DEBT, NET OF CURRENT MATURITIES	2,400	2,400
NOTES TO FORMER OWNERS, NET OF CURRENT MATURITIES	12,249	12,349
DEFERRED INCOME TAX LIABILITIES	5,131	4,541
OTHER LONG-TERM LIABILITIES	10,838	10,699
Total liabilities	296,859	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, 3,705,506 and 3,714,506 shares, respectively	(39,341)	(39,437)
Additional paid-in capital	322,273	323,608
Retained earnings (deficit)	(21,020)	(19,991)
Comfort Systems USA, Inc. stockholders' equity	262,323	264,591
Noncontrolling interests	16,876	18,515
Total stockholders' equity	279,199	283,106
Total liabilities and stockholders' equity	$ 576,058	$ 591,066