XML 37 R26.htm IDEA: XBRL DOCUMENT
v3.20.2

Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Allowance for Doubtful Accounts Receivable [Roll Forward] |  |
Balance at beginning of year | $ 6,907 |
Impact of new accounting standard | 695 |
Bad debt expense (benefit) | 4,593 | $ 784
Deductions for uncollectible receivables written off, net of recoveries | (809) |
Credit allowance of acquired companies on the acquisition date | 502 |
Purchase accounting adjustments | 72 |
Reclass to other current liabilities | (315) |
Balance at March 31, 2020 | 11,645 |
Service |  |
Allowance for Doubtful Accounts Receivable [Roll Forward] |  |
Balance at beginning of year | 3,192 |
Impact of new accounting standard | 310 |
Bad debt expense (benefit) | 2,384 |
Deductions for uncollectible receivables written off, net of recoveries | (728) |
Balance at March 31, 2020 | 5,158 |
Construction |  |
Allowance for Doubtful Accounts Receivable [Roll Forward] |  |
Balance at beginning of year | 3,400 |
Impact of new accounting standard | 331 |
Bad debt expense (benefit) | 2,219 |
Deductions for uncollectible receivables written off, net of recoveries | (81) |
Credit allowance of acquired companies on the acquisition date | 502 |
Purchase accounting adjustments | 72 |
Balance at March 31, 2020 | 6,443 |
Other. |  |
Allowance for Doubtful Accounts Receivable [Roll Forward] |  |
Balance at beginning of year | 315 |
Impact of new accounting standard | 54 |
Bad debt expense (benefit) | (10) |
Reclass to other current liabilities | (315) |
Balance at March 31, 2020 | $ 44 |

X
- Definition Amount of purchase accounting adjustment in allowance for credit loss on accounts receivable. + References No definition available. + Details
Name: | fix_AccountsReceivableAllowanceForCreditLossPurchaseAccountingAdjustment
Namespace Prefix: | fix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the allowance for receivables acquired in a business acquisition. + References No definition available. + Details
Name: | fix_AllowanceForDoubtfulAccountsReceivableAcquired
Namespace Prefix: | fix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of allowance for credit loss reclassified into other liabilities during the period. + References No definition available. + Details
Name: | fix_ReclassificationOfAllowanceForCreditLosses
Namespace Prefix: | fix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable from change in methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 11 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919244-210447 + Details
Name: | us-gaap_AccountsReceivableChangeInMethodCreditLossExpenseReversal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=fix_ServicesActivityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=fix_ConstructionActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProductAndServiceOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |