XML 59 R43.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Commitments and Contingencies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract] |
Fair Value of Annuities | The following table summarizes (in thousands) the fair value of the annuities at December 31, 2015, that the Company has purchased to satisfy its obligations. The A.M. Best Company rating is shown parenthetically.
Life Insurance Company |  | Statement Value of Annuities Exceeding 1% of Statutory Surplus |
Metropolitan Life Insurance Company (A+) |  | $ | 16,279 |
Pacific Life and Annuity Company (A+) |  |  | 15,739 |
American General Life Insurance (A) |  |  | 15,364 |
New York Life Insurance Company (A++) |  |  | 11,303 |
John Hancock Life Insurance Company USA (A+) |  |  | 7,596 |
Athene Annuity and Life Assurance Company (A-) |  |  | 6,133 |
Liberty Life Assurance Company of Boston (A) |  |  | 3,837 |
Other |  |  | 19,441 |
|  | $ | 95,692 |
Future Minimum Lease Payments | The Company leases equipment and office space under noncancelable operating leases. At December 31, 2015, future minimum lease payments are as follows (in thousands):
2016 |  | $ | 152 |
2017 |  |  | 114 |
2018 |  |  | 68 |
2019 |  |  | 6 |
|  | $ | 340 |

X
- Definition Purchase Amount Of Annuities Table [Text Block] + References No definition available. + Details
Name: | amsf_PurchaseAmountOfAnnuitiesTableTextBlock
Namespace Prefix: | amsf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration