XML 94 R83.htm IDEA: XBRL DOCUMENT
v3.21.2

Short-Term Borrowings - Narrative (Detail) - USD ($) | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2018 | Sep. 30, 2021 | Dec. 31, 2020 | Aug. 09, 2018 | Aug. 08, 2018
Line of Credit Facility [Line Items] |  |  |  |  |
Fund-based and non-fund-based credit facilities limits available |  | $ 20,209,000 | $ 14,311,000 |  |
Utilization of credit facility for non fund-based usage |  | $ 4,206,000 | $ 7,809,000 |  |
Margin over LIBOR (in percentage) | 1.375% | 1.375% | 1.375% |  |
Commitment fee (in percentage) |  | 0.20% | 0.20% |  |
Credit facility, amount utilized |  | $ 2,017,000 | $ 252,347,000 |  |
Short-term borrowings |  | $ 0 | $ 250,000,000 |  |
Revolving Credit Facility |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  | $ 500,000,000 | $ 350,000,000
Fund-Based Credit Facility |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Margin over LIBOR (in percentage) |  | 1.375% | 1.375% |  |
Non-Fund-Based Credit Facility |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit facility, amount utilized |  | $ 2,017,000 | $ 2,347,000 |  |

X
- Definition Limit available for fund based and non fund based credit facilities with banks for short term in the form of overdraft, letter of credit, guarantees, short term loans excluding forward hedging. + References No definition available. + Details
Name: | g_FundBasedNonFundBasedCreditFacilityLimit
Namespace Prefix: | g_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Utilized amount of borrowed credit facility as of the balance sheet date. + References No definition available. + Details
Name: | g_LineOfCreditFacilityAmountUtilized
Namespace Prefix: | g_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents the margin to be added to LIBOR to arrive at the interest rate to be paid on the credit facility. + References No definition available. + Details
Name: | g_MarginOverLiborForInterestRateOnLineOfCredit
Namespace Prefix: | g_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition It represents the fee, expressed as a percentage of the unutilized amount of the line of credit facility. + References No definition available. + Details
Name: | g_UnutilizedAmountOfLineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix: | g_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the utilization of credit facility for non-fund based usage for short term in the form of overdraft, letter of credit, guarantees, short term loans excluding forward hedging. + References No definition available. + Details
Name: | g_UtilizationOfCreditFacilityForNonFundBasedUsage
Namespace Prefix: | g_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_ShortTermBorrowings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=g_FundBasedCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=g_NonFundBasedCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |