XML 12 R37.htm IDEA: XBRL DOCUMENT v3.19.3

Securities- Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	$ 428,261	$ 1,586,756
Investments with an unrealized loss of less than 12 months, unrealized losses	3,217	38,920
Investments with an unrealized loss of 12 months or longer, fair value	696,427	1,161,369
Investments with an unrealized loss of 12 months or longer, unrealized losses	17,016	32,811
Total investments with an unrealized loss, fair value	1,124,688	2,748,125
Total investments with an unrealized loss, unrealized losses	20,233	71,731
U.S. Treasury securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	9,622	30,054
Investments with an unrealized loss of less than 12 months, unrealized losses	4	22
Investments with an unrealized loss of 12 months or longer, fair value	0	246
Investments with an unrealized loss of 12 months or longer, unrealized losses	0	3
Total investments with an unrealized loss, fair value	9,622	30,300
Total investments with an unrealized loss, unrealized losses	4	25
U.S. government agency securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	2,942	13,697
Investments with an unrealized loss of less than 12 months, unrealized losses	5	328
Investments with an unrealized loss of 12 months or longer, fair value	33,247	42,539
Investments with an unrealized loss of 12 months or longer, unrealized losses	829	1,018
Total investments with an unrealized loss, fair value	36,189	56,236
Total investments with an unrealized loss, unrealized losses	834	1,346
Mortgage-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	116,784	203,299
Investments with an unrealized loss of less than 12 months, unrealized losses	515	2,134
Investments with an unrealized loss of 12 months or longer, fair value	210,395	882,231
Investments with an unrealized loss of 12 months or longer, unrealized losses	3,150	26,500
Total investments with an unrealized loss, fair value	327,179	1,085,530
Total investments with an unrealized loss, unrealized losses	3,665	28,634
State and municipal securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	214,033	1,044,757
Investments with an unrealized loss of less than 12 months, unrealized losses	1,874	30,780
Investments with an unrealized loss of 12 months or longer, fair value	383,023	198,610
Investments with an unrealized loss of 12 months or longer, unrealized losses	11,813	4,078
Total investments with an unrealized loss, fair value	597,056	1,243,367
Total investments with an unrealized loss, unrealized losses	13,687	34,858
Asset-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	69,921	268,677
Investments with an unrealized loss of less than 12 months, unrealized losses	699	4,118
Investments with an unrealized loss of 12 months or longer, fair value	57,709	11,828
Investments with an unrealized loss of 12 months or longer, unrealized losses	503	227
Total investments with an unrealized loss, fair value	127,630	280,505
Total investments with an unrealized loss, unrealized losses	1,202	4,345
Corporate notes
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	14,959	26,272
Investments with an unrealized loss of less than 12 months, unrealized losses	120	1,538
Investments with an unrealized loss of 12 months or longer, fair value	12,053	25,915
Investments with an unrealized loss of 12 months or longer, unrealized losses	721	985
Total investments with an unrealized loss, fair value	27,012	52,187
Total investments with an unrealized loss, unrealized losses	$ 841	$ 2,523

X

- Definition

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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_USStatesAndPoliticalSubdivisionsMember
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_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: