XML 42 R33.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Investments - Schedule of Investments Available for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Investments available for sale |  |
Amortized Cost | $ 5,075,982 | $ 4,897,607
Unrealized Gains | 242 | 98,747
Unrealized Losses | (491,380) | (33,467)
Fair Value | 4,584,844 | 4,962,887
U.S. Treasury securities |  |
Investments available for sale |  |
Amortized Cost | 566,466 | 447,926
Unrealized Gains | 2 | 3,833
Unrealized Losses | (30,832) | (2,966)
Fair Value | 535,636 | 448,793
U.S. agency securities |  |
Investments available for sale |  |
Amortized Cost | 0 | 5,501
Unrealized Gains | 0 | 3
Unrealized Losses | 0 | 0
Fair Value | 0 | 5,504
U.S. agency mortgage-backed securities |  |
Investments available for sale |  |
Amortized Cost | 879,028 | 1,005,611
Unrealized Gains | 0 | 13,365
Unrealized Losses | (126,792) | (10,113)
Fair Value | 752,236 | 1,008,863
Municipal debt securities |  |
Investments available for sale |  |
Amortized Cost | 627,772 | 598,764
Unrealized Gains | 95 | 30,122
Unrealized Losses | (68,083) | (1,287)
Fair Value | 559,784 | 627,599
Non-U.S. government securities |  |
Investments available for sale |  |
Amortized Cost | 70,126 | 77,366
Unrealized Gains | 0 | 3,232
Unrealized Losses | (9,292) | (855)
Fair Value | 60,834 | 79,743
Corporate debt securities |  |
Investments available for sale |  |
Amortized Cost | 1,501,150 | 1,428,645
Unrealized Gains | 7 | 36,067
Unrealized Losses | (155,888) | (9,465)
Fair Value | 1,345,269 | 1,455,247
Residential and commercial mortgage securities |  |
Investments available for sale |  |
Amortized Cost | 586,771 | 541,638
Unrealized Gains | 123 | 10,452
Unrealized Losses | (63,286) | (6,667)
Fair Value | 523,608 | 545,423
Asset-backed securities |  |
Investments available for sale |  |
Amortized Cost | 645,522 | 582,144
Unrealized Gains | 15 | 1,673
Unrealized Losses | (37,207) | (2,114)
Fair Value | 608,330 | 581,703
Money market funds |  |
Investments available for sale |  |
Amortized Cost | 199,147 | 210,012
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Value | $ 199,147 | $ 210,012

X
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 + Details
Name: | us-gaap_DebtSecuritiesTradingAndAvailableForSale
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=esnt_ResidentialAndCommercialMortgageSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |