XML 34 R24.htm IDEA: XBRL DOCUMENT v3.20.2

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

At September 30, 2020, assets measured at fair value on a recurring basis are summarized below:

		September 30, 2020
		Level 1 Inputs				Level 2 Inputs				Level 3 Inputs				Total Fair Value
		(in thousands)
Financial instruments carried at fair value, classified as a part of:
Securities available-for-sale—fixed maturity:
States and political subdivisions		$	—			$	275,371			$	—			$	275,371
Corporate bonds			—				96,629				—				96,629
U.S. agency-based mortgage-backed securities			—				24,310				—				24,310
U.S. Treasury securities			29,927				—				—				29,927
Total securities available-for-sale—fixed maturity			29,927				396,310				—				426,237
Equity securities:
Domestic common stock			35,822				—				—				35,822
Total		$	65,749			$	396,310			$	—			$	462,059

At December 31, 2019, assets measured at fair value on a recurring basis are summarized below:

		December 31, 2019
		Level 1 Inputs				Level 2 Inputs				Level 3 Inputs				Total Fair Value
		(in thousands)
Financial instruments carried at fair value, classified as a part of:
Securities available-for-sale—fixed maturity:
States and political subdivisions		$	—			$	237,775			$	—			$	237,775
Corporate bonds			—				133,778				—				133,778
U.S. agency-based mortgage-backed securities			—				29,467				—				29,467
U.S. Treasury securities			40,126				—				—				40,126
Total securities available-for-sale—fixed maturity		$	40,126			$	401,020			$	—			$	441,146
Equity securities:
Domestic common stock			27,903				—				—				27,903
Total		$	68,029			$	401,020			$	—			$	469,049

Schedule of Assets Measured at Amortized Cost Net of Allowance For Credit Losses

At September 30, 2020, assets measured at amortized cost net of allowance for credit losses are summarized below:

		September 30, 2020
		Level 1 Inputs				Level 2 Inputs				Level 3 Inputs				Total Fair Value
		(in thousands)
Securities held-to-maturity—fixed maturity:
States and political subdivisions		$	—			$	502,623			$	—			$	502,623
Corporate bonds			—				73,585				—				73,585
U.S. agency-based mortgage-backed securities			—				8,714				—				8,714
U.S. Treasury securities			17,190				—				—				17,190
Obligations of U.S. government agencies			—				5,050				—				5,050
Asset-backed securities			—				177				—				177
Total held-to-maturity		$	17,190			$	590,149			$	—			$	607,339

At December 31, 2019, assets measured at amortized cost are summarized below:

		December 31, 2019
		Level 1 Inputs				Level 2 Inputs				Level 3 Inputs				Total Fair Value
		(in thousands)
Securities held-to-maturity—fixed maturity:
States and political subdivisions		$	—			$	485,647			$	—			$	485,647
Corporate bonds			—				110,925				—				110,925
U.S. agency-based mortgage-backed securities			—				11,511				—				11,511
U.S. Treasury securities			7,873				—				—				7,873
Obligations of U.S. government agencies			—				5,168				—				5,168
Asset-backed securities			—				219				—				219
Total held-to-maturity		$	7,873			$	613,470			$	—			$	621,343

Summary of Carrying Amounts and Corresponding Fair Values for Financial Instruments

The following table summarizes the carrying amounts and corresponding fair values for financial instruments:

		As of  September 30, 2020								As of  December 31, 2019
		Carrying Amount				Fair Value				Carrying Amount				Fair Value
		(in thousands)
Assets:
Fixed maturity securities—held-to-maturity		$	572,508			$	607,339			$	599,421			$	621,343
Fixed maturity securities—available-for-sale			426,237				426,237				441,146				441,146
Equity securities			35,822				35,822				27,903				27,903
Short-term investments			90,826				90,826				56,548				56,548
Cash and cash equivalents			88,168				88,168				43,813				43,813

X

- Definition

Fair value schedule of assets carried at amortized cost.

+ References

No definition available.

+ Details

Name:	amsf_HeldToMaturitySecuritiesTableTextBlock
Namespace Prefix:	amsf_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueByBalanceSheetGroupingTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration