Nature of Operations and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The unaudited consolidated interim financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") for interim financial reporting and with the instructions to Form 10-Q and Regulation S-X promulgated by the SEC. Certain financial information that is included in our Annual Report on Form 10-K, including certain financial statement footnote disclosures, are not required by the rules and regulations of the SEC for interim financial reporting and have been condensed or omitted.
Use of Estimates	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The financial statement categories that are most dependent on management estimates and assumptions include: investments; deferred policy acquisition costs; reinsurance receivables and recoverables; future policy benefits and losses, claims and loss settlement expenses; and pension and postretirement benefit obligations.
Cash and Cash Equivalents	For purposes of reporting cash flows, cash and cash equivalents include cash, money market accounts, and non-negotiable certificates of deposit with original maturities of three months or less.
Deferred Policy Acquisition Costs (DAC)	Property and casualty insurance policy acquisition costs deferred are amortized as premium revenue is recognized. The method followed in computing DAC limits the amount of such deferred costs to their estimated realizable value. This takes into account the premium to be earned, losses and loss settlement expenses expected to be incurred and certain other costs expected to be incurred as the premium is earned. With the completion of the Mercer Insurance Group integration, we determined it was the appropriate time to review our DAC models. After reviewing our DAC model at March 31, 2015, we enhanced our property & casualty insurance segment DAC model by updating our aggregation of certain lines of business in a manner consistent with how the policies are currently being marketed and managed. The impact of these updates to the model resulted in an increase to other underwriting amortization of $149 and an increase to the DAC asset of $2,709 for the six-month period ended June 30, 2015 as compared to what we would have recognized had we not updated our model. For traditional life insurance policies, DAC is amortized to income over the premium-paying period in proportion to the ratio of the expected annual premium revenue to the expected total premium revenue. Expected premium revenue and gross profits are based on the same mortality and withdrawal assumptions used in determining future policy benefits. These assumptions are not revised after policy issuance unless the recorded DAC asset is deemed to be unrecoverable from future expected profits. For non-traditional life insurance policies, DAC is amortized over the anticipated terms in proportion to the ratio of the expected annual gross profits to the total expected gross profits. Changes in the amount or timing of expected gross profits result in adjustments to the cumulative amortization of these costs. The effect on amortization of DAC for revisions to estimated gross profits is reported in earnings in the period the estimated gross profits are revised. The effect on DAC that results from the assumed realization of unrealized gains (losses) on investments allocated to non-traditional life insurance business is recognized with an offset, to net unrealized investment appreciation as of the balance sheet date. Certain costs associated with underwriting new business (primarily commissions, premium taxes and variable underwriting and policy issue expenses associated with successful acquisition efforts) are deferred.
Income Taxes	Deferred tax assets and liabilities are established based on differences between the financial statement bases of assets and liabilities and the tax bases of those same assets and liabilities, using the currently enacted statutory tax rates. Deferred income tax expense is measured by the year-to-year change in the net deferred tax asset or liability, except for certain changes in deferred tax amounts that affect stockholders' equity and do not impact federal income tax expense. We reported a federal income tax expense of $12,667 and $4,937 for the six-month periods ended June 30, 2015 and 2014, respectively. Our effective tax rate is different than the federal statutory rate of 35.0 percent due principally to the effect of tax-exempt municipal bond interest income and non-taxable dividend income. The Company performs a quarterly review of its tax position and makes a determination of whether it is more likely than not that the tax position will be sustained upon examination. If based on review, it appears not more likely than not that the position will be sustained, the Company will calculate any unrecognized tax benefits and, if necessary, calculate and accrue any related interest and penalties. We did not recognize any liability for unrecognized tax benefits at June 30, 2015 or December 31, 2014. In addition, we have not accrued for interest and penalties related to unrecognized tax benefits. However, if interest and penalties would need to be accrued related to unrecognized tax benefits, such amounts would be recognized as a component of federal income tax expense. We file a consolidated federal income tax return. We also file income tax returns in various state jurisdictions. We are no longer subject to federal or state income tax examination for years before 2009. The Internal Revenue Service is conducting a routine examination of our income tax return for the 2011 tax year.
Subsequent Events	In the preparation of the accompanying financial statements, the Company has evaluated all material subsequent events or transactions that occurred after the balance sheet date through the date on which the financial statements were issued for potential recognition or disclosure in the Company's financial statements.
Recently Issued Accounting Standards	Accounting Standards Adopted in 2015 Troubled Debt Restructuring In August 2014, the FASB issued updated guidance on the accounting for creditors who are holding receivables with troubled debt restructuring, specifically related to the classification of certain government guaranteed mortgage loans that are in foreclosure. The objective of this update is to provide greater consistency and transparency by addressing the classification of certain foreclosed mortgage loans guaranteed through government programs. The guidance is effective for interim and annual periods beginning after December 15, 2014. The Company adopted the guidance on January 1, 2015. The adoption of the new guidance had no impact on the Company's financial position or results of operations. Discontinued Operations In April 2014, the FASB issued new guidance on reporting discontinued operations and disclosures of disposals of components of an entity. The new guidance raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation. It is effective for annual periods beginning after December 15, 2014. The Company adopted the guidance on January 1, 2015. The adoption of the new guidance had no impact on the Company's financial position or results of operations. Pending Adoption of Accounting Standards Short Duration Contracts In May 2015, the Financial Accounting Standards Board ("FASB") issued guidance on disclosure requirements for short-duration contracts. The new guidance requires additional disclosures about the liability for unpaid loss and loss adjustment expenses and requires disclosure of any information about significant changes in methodologies and assumptions used to calculate the liability. The new guidance is effective for annual periods beginning after December 15, 2015 and interim periods beginning the following year. The Company will adopt the new guidance on January 1, 2016 and is currently evaluating its disclosures for short-duration contracts and the impact on the Company's financial statement disclosures. Other Internal Use Software In April 2015, the FASB issued guidance which clarifies customers' accounting for fees paid for cloud computing arrangements. The new guidance provides guidance to customers about whether a cloud computing arrangement includes a software license or whether the arrangement is considered a service contract. The new guidance is effective for annual and interim periods beginning after December 15, 2015. The Company will adopt the new guidance on January 1, 2016 and is currently evaluating its accounting for cloud computing arrangements and the impact on the Company's financial position and results of operations. Debt Issuance Costs In April 2015, the FASB issued new guidance on the presentation of debt issuance costs. The new guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability. The new guidance is effective for annual and interim periods beginning after December 15, 2015. The Company will adopt the new guidance on January 1, 2016. At this point in time, Management does not expect the adoption of the new guidance to have an impact on the Company's financial position or results of operations. Consolidation In February 2015, the FASB issued amendments to the consolidation analysis that a reporting entity performs to determine whether it should consolidate certain legal entities. Specifically, the new guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIE"), eliminates the presumption that a general partner should consolidate a limited partnership and affects the consolidation analysis of reporting entities that have VIE's, particularly those with fee arrangements and related party relationships. The new guidance is effective for annual and interim periods beginning after December 15, 2015. The Company will adopt the new guidance on January 1, 2016 and is currently evaluating the impact on the Company's financial position and results of operations. Going Concern In August 2014, the FASB issued new guidance on the disclosure of uncertainties about an entity's ability to continue as a going concern. The new guidance requires management to evaluate whether there is substantial doubt about the entity's ability to continue as a going concern and, if so, to disclose the fact and what the entity's plans are to alleviate that doubt. The guidance is effective for annual periods ending after December 15, 2015 and interim periods within annual periods beginning after December 15, 2015. The Company will adopt the guidance on January 1, 2016. Management currently does not expect the adoption of the new guidance to have an impact on the Company's financial position or results of operations. Share Based Payments In June 2014, the FASB issued new guidance on the accounting for share based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. The new guidance requires a performance target that affects vesting and that could be achieved after the service period, be treated as a performance condition. The guidance is effective for interim and annual periods beginning after December 15, 2015. The amendments can be applied prospectively or retrospectively and early adoption is permitted. The Company will adopt the guidance on January 1, 2016 and is currently evaluating the impact on the Company's financial position and results of operations. Revenue Recognition In May 2014, the FASB issued comprehensive new guidance on revenue recognition which supersedes nearly all existing revenue recognition guidance under GAAP. The new guidance requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The standard creates a five-step model that requires companies to exercise judgment when considering the terms of the contract(s) and all relevant facts and circumstances. Insurance contracts are not within the scope of this new guidance. The new guidance is effective for annual and interim periods beginning after December 15, 2017. The Company will adopt the guidance on January 1, 2018 and is currently evaluating the impact on the Company's financial position and results of operations and considering which transition method it will use in implementing the new guidance.

Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.

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Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

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