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v2.4.1.9

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Operating activities |  |  |
Net income | $ 53,666 us-gaap_NetIncomeLoss | $ 43,637 us-gaap_NetIncomeLoss | $ 29,353 us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 1,298 us-gaap_OtherDepreciationAndAmortization | 1,300 us-gaap_OtherDepreciationAndAmortization | 1,112 us-gaap_OtherDepreciationAndAmortization
Net amortization/accretion of investments | 15,243 us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments | 13,350 us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments | 10,151 us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments
Deferred income taxes | (1,412)us-gaap_DeferredIncomeTaxExpenseBenefit | (207)us-gaap_DeferredIncomeTaxExpenseBenefit | 115 us-gaap_DeferredIncomeTaxExpenseBenefit
Net realized (gains) losses on investments | (697)us-gaap_MarketableSecuritiesRealizedGainLoss | 1,211 us-gaap_MarketableSecuritiesRealizedGainLoss | (2,979)us-gaap_MarketableSecuritiesRealizedGainLoss
Loss on sale of asset |  | 2 us-gaap_GainLossOnSaleOfPropertyPlantEquipment | 1 us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Share-based compensation | 1,519 us-gaap_ShareBasedCompensation | 1,409 us-gaap_ShareBasedCompensation | 641 us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities: |  |  |
Premiums receivable, net | (7,338)us-gaap_IncreaseDecreaseInPremiumsReceivable | (29,629)us-gaap_IncreaseDecreaseInPremiumsReceivable | (20,727)us-gaap_IncreaseDecreaseInPremiumsReceivable
Accrued interest receivable | (395)us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable | (850)us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable | (872)us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable
Deferred policy acquisition costs | (478)us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts | (752)us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts | (1,841)us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts
Other assets | (7,889)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet | 1,581 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet | 445 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Reserve for loss and loss adjustment expenses | 73,045 us-gaap_IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve | 44,107 us-gaap_IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve | 32,236 us-gaap_IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve
Unearned premiums | 4,280 us-gaap_IncreaseDecreaseInUnearnedPremiums | 23,768 us-gaap_IncreaseDecreaseInUnearnedPremiums | 21,829 us-gaap_IncreaseDecreaseInUnearnedPremiums
Reinsurance balances | (10,326)amsf_IncreaseDecreaseReinsuranceBalances | 26,177 amsf_IncreaseDecreaseReinsuranceBalances | (5,910)amsf_IncreaseDecreaseReinsuranceBalances
Amounts held for others and policyholder deposits | 11,190 amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits | 238 amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits | 12,912 amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits
Accounts payable and other liabilities | 8,734 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 3,561 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 4,582 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Net cash provided by operating activities | 140,440 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 128,903 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 81,048 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Investing activities |  |  |
Purchases of investments held-to-maturity | (225,285)us-gaap_PaymentsToAcquireHeldToMaturitySecurities | (77,868)us-gaap_PaymentsToAcquireHeldToMaturitySecurities | (79,042)us-gaap_PaymentsToAcquireHeldToMaturitySecurities
Purchases of investments available-for-sale | (149,956)us-gaap_PaymentsToAcquireAvailableForSaleSecurities | (135,798)us-gaap_PaymentsToAcquireAvailableForSaleSecurities | (92,751)us-gaap_PaymentsToAcquireAvailableForSaleSecurities
Purchases of short-term investments | (79,957)us-gaap_PaymentsToAcquireShortTermInvestments | (131,981)us-gaap_PaymentsToAcquireShortTermInvestments | (95,954)us-gaap_PaymentsToAcquireShortTermInvestments
Purchases of other invested assets |  | (10,000)us-gaap_PaymentsToAcquireOtherInvestments |
Proceeds from maturities of investments held-to-maturity | 114,601 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities | 117,750 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities | 134,994 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities
Proceeds from sales and maturities of investments available-for-sale | 72,535 us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities | 29,099 us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities | 52,514 us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
Proceeds from sales and maturities of short-term investments | 128,043 us-gaap_ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments | 112,978 us-gaap_ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments | 72,105 us-gaap_ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments
Purchases of property and equipment | (989)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (1,140)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (1,196)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash used in investing activities | (141,008)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (96,960)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (9,330)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Financing activities |  |  |
Proceeds from stock option exercises | 2,674 us-gaap_ProceedsFromStockOptionsExercised | 2,344 us-gaap_ProceedsFromStockOptionsExercised | 781 us-gaap_ProceedsFromStockOptionsExercised
Tax benefit from share-based payments | 2,841 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 2,024 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 421 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Redemption of subordinated debt securities |  |  | (25,780)us-gaap_RepaymentsOfSubordinatedDebt
Dividends to shareholders | (37,068)us-gaap_PaymentsOfDividendsCommonStock | (5,910)us-gaap_PaymentsOfDividendsCommonStock |
Net cash used in financing activities | (31,553)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (1,542)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (24,578)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Change in cash and cash equivalents | (32,121)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 30,401 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 47,140 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of year | 123,077 us-gaap_CashAndCashEquivalentsAtCarryingValue | 92,676 us-gaap_CashAndCashEquivalentsAtCarryingValue | 45,536 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of year | 90,956 us-gaap_CashAndCashEquivalentsAtCarryingValue | 123,077 us-gaap_CashAndCashEquivalentsAtCarryingValue | 92,676 us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosure of cash flow information |  |  |
Interest paid |  |  | 686 us-gaap_InterestPaid
Income taxes paid | $ 19,926 us-gaap_IncomeTaxesPaidNet | $ 12,512 us-gaap_IncomeTaxesPaidNet | $ 7,004 us-gaap_IncomeTaxesPaidNet

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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
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- Definition The other noncash expense, not otherwise specified in the taxonomy, charged against earnings in the period to allocate the cost of tangible and intangible assets over their remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Amount of cash outflow through purchase of long-term held-to-maturity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with other investments held by the entity for investment purposes not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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