XML 103 R90.htm IDEA: XBRL DOCUMENT
v3.24.1.1.u2

Capital Stock - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 26, 2024 | Feb. 08, 2024 | Mar. 24, 2023 | Feb. 09, 2023 | Feb. 10, 2022 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase authorized amount |  |  |  |  |  |  |  | $ 2,250,000
Shares repurchased and retired (in shares) |  |  |  |  |  | 864,925 | 630,605 |
Common stock shares repurchased price per share (in usd per share) |  |  |  |  |  | $ 34.67 | $ 47.57 |
Expenses related to stock purchase |  |  |  |  |  | $ 17 | $ 13 |
Stock repurchase program, remaining authorized repurchase amount |  |  |  |  |  | $ 369,560 |  |
Increase in quarterly cash dividend (in percentage) |  | 11.00% |  | 10.00% |  |  |  |
Quarterly dividend declared (in usd per share) | $ 0.1525 | $ 0.1525 | $ 0.1375 | $ 0.1375 | $ 0.125 | $ 0.1525 | $ 0.1375 |
Annual dividend (in usd per share) |  | $ 0.61 |  | $ 0.55 | $ 0.50 |  |  |
Initial dividend paid | $ 27,492 |  | $ 25,255 |  |  |  |  |
Share repurchase open market |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Aggregate amount of common stock shares repurchased |  |  |  |  |  | $ 29,985 | $ 30,000 |

X
- Definition Common stock dividends annual dividend. + References No definition available. + Details
Name: | g_CommonStockDividendsAnnualDividend
Namespace Prefix: | g_
Data Type: | dtr-types1:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expenses Related To Stock Purchase Extension + References No definition available. + Details
Name: | g_ExpensesRelatedToStockPurchaseExtension
Namespace Prefix: | g_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage increase in quarterly cash dividend. + References No definition available. + Details
Name: | g_PercentageIncreaseInQuarterlyCashDividend
Namespace Prefix: | g_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481071/942-405-45-2 + Details
Name: | us-gaap_Dividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_EquityClassOfTreasuryStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481549/505-30-45-1 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=g_ShareRepurchaseOpenMarketMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |