CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 23,346	$ 40,757
Accounts receivable, less allowance for doubtful accounts of $4,584 and $6,333, respectively	291,828	256,959
Other receivables	8,775	12,376
Inventories	9,651	9,638
Prepaid expenses and other	25,714	25,037
Costs and estimated earnings in excess of billings	29,314	26,204
Assets related to discontinued operations	600	1,582
Total current assets	389,228	372,553
PROPERTY AND EQUIPMENT, NET	42,522	41,416
GOODWILL	114,588	114,588
IDENTIFIABLE INTANGIBLE ASSETS, NET	40,846	44,515
OTHER NONCURRENT ASSETS	8,062	7,682
Total assets	595,246	580,754
CURRENT LIABILITIES:
Current maturities of long-term debt	300	300
Accounts payable	101,248	100,641
Accrued compensation and benefits	39,547	36,892
Billings in excess of costs and estimated earnings	76,083	73,814
Accrued self-insurance expense	29,636	29,096
Other current liabilities	28,173	27,077
Liabilities related to discontinued operations	584	767
Total current liabilities	275,571	268,587
LONG-TERM DEBT, NET OF CURRENT MATURITIES	2,100	2,100
NOTES TO FORMER OWNERS	3,000	5,000
DEFERRED INCOME TAX LIABILITIES	8,267	7,954
OTHER LONG-TERM LIABILITIES	10,154	9,807
Total liabilities	299,092	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, 3,806,172 and 3,879,299 shares, respectively	(40,509)	(41,012)
Additional paid-in capital	316,727	317,534
Retained earnings (deficit)	1,909	(6,528)
Comfort Systems USA, Inc. stockholders' equity	278,538	270,405
Noncontrolling interests	17,616	16,901
Total stockholders' equity	296,154	287,306
Total liabilities and stockholders' equity	$ 595,246	$ 580,754