United Fire (UFCS) 10-Q 2 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Trading Symbol	UFCS
Entity Registrant Name	UNITED FIRE GROUP INC
Entity Central Index Key	101,199
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding (in shares)		25,357,805

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fixed maturities
Held-to-maturity, at amortized cost (fair value $655 in 2016 and $675 in 2015)	$ 652	$ 672
Available-for-sale, at fair value (amortized cost $2,801,074 in 2016 and $2,793,069 in 2015)	2,916,464	2,824,961
Trading securities, at fair value (amortized cost $11,587 in 2016 and $11,475 in 2015)	13,253	12,622
Equity securities
Available-for-sale, at fair value (cost $67,909 in 2016 and $68,514 in 2015)	251,101	236,247
Trading securities, at fair value (cost $4,410 in 2016 and $4,443 in 2015)	4,645	4,353
Mortgage loans	3,772	3,961
Policy loans	5,300	5,618
Other long-term investments	57,787	54,151
Short-term investments	175	175
Total investments	3,253,149	3,142,760
Cash and cash equivalents	140,944	106,449
Accrued investment income	27,007	25,136
Premiums receivable (net of allowance for doubtful accounts of $1,248 in 2016 and $867 in 2015)	331,242	276,517
Deferred policy acquisition costs	157,238	168,264
Property and equipment (primarily land and buildings, at cost, less accumulated depreciation of $50,043 in 2016 and $46,590 in 2015)	54,994	53,241
Reinsurance receivables and recoverables	87,159	73,527
Prepaid reinsurance premiums	4,002	3,790
Income taxes receivable	11,732	0
Goodwill and intangible assets	24,932	25,509
Other assets	14,638	15,183
TOTAL ASSETS	4,107,037	3,890,376
Future policy benefits and losses, claims and loss settlement expenses
Property and casualty insurance	1,090,167	1,003,895
Life insurance	1,355,639	1,372,358
Unearned premiums	468,745	415,057
Accrued expenses and other liabilities	189,519	200,599
Income taxes payable	0	4,917
Deferred income taxes	43,787	14,653
TOTAL LIABILITIES	3,147,857	3,011,479
Stockholders’ Equity
Common stock, $0.001 par value; authorized 75,000,000 shares; 25,357,605 and 25,151,428 shares issued and outstanding in 2016 and 2015, respectively	25	25
Additional paid-in capital	213,957	207,426
Retained earnings	610,672	591,009
Accumulated other comprehensive income, net of tax	134,526	80,437
TOTAL STOCKHOLDERS’ EQUITY	959,180	878,897
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 4,107,037	$ 3,890,376

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Fixed maturities, held-to-maturity securities, fair value	$ 655	$ 675
Fixed maturities, available-for-sale securities, amortized cost	2,801,074	2,793,069
Fixed maturities, trading securities, amortized cost	11,587	11,475
Equity securities, available-for-sale securities, amortized cost	67,909	68,514
Equity securities, trading securities, amortized cost	4,410	4,443
Allowance for doubtful accounts	1,248	867
Property and equipment accumulated depreciation	$ 50,043	$ 46,590
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	25,357,605	25,151,428
Common stock, shares outstanding (in shares)	25,357,605	25,151,428

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Net premiums earned	$ 260,069	$ 239,421	$ 754,854	$ 681,817
Investment income, net of investment expenses	26,690	24,050	73,421	74,205
Net realized investment gains (includes reclassifications for net unrealized investment gains on available-for-sale securities of $2,320 and $4,666 in 2016 and $1,825 and $4,715 in 2015; previously included in accumulated other comprehensive income)	2,590	966	6,241	2,622
Other income	145	123	436	318
Total revenues	289,494	264,560	834,952	758,962
Benefits, Losses and Expenses
Losses and loss settlement expenses	176,555	144,526	499,095	421,297
Increase in liability for future policy benefits	14,091	12,784	42,645	32,503
Amortization of deferred policy acquisition costs	54,116	48,697	156,932	135,526
Other underwriting expenses (includes reclassifications for employee benefit costs of $1,371 and $4,113 in 2016 and $1,867 and $5,601 in 2015; previously included in accumulated other comprehensive income)	24,574	26,161	76,099	73,241
Interest on policyholders’ accounts	4,983	5,568	15,368	18,207
Total benefits, losses and expenses	274,319	237,736	790,139	680,774
Income before income taxes	15,175	26,824	44,813	78,188
Federal income tax expense (benefit) (includes reclassifications of ($332) and ($194) in 2016 and $15 and $310 in 2015; previously included in accumulated other comprehensive income)	2,807	7,290	6,904	19,957
Net income	12,368	19,534	37,909	58,231
Other comprehensive income (loss)
Change in net unrealized appreciation on investments	(9,440)	(2,008)	83,768	(25,131)
Change in liability for underfunded employee benefit plans	0	0	0	0
Other comprehensive income (loss), before tax and reclassification adjustments	(9,440)	(2,008)	83,768	(25,131)
Income tax effect	3,304	703	(29,320)	8,795
Other comprehensive income (loss), after tax, before reclassification adjustments	(6,136)	(1,305)	54,448	(16,336)
Reclassification adjustment for net realized investment gains included in income	(2,320)	(1,825)	(4,666)	(4,715)
Reclassification adjustment for employee benefit costs included in expense	1,371	1,867	4,113	5,601
Total reclassification adjustments, before tax	(949)	42	(553)	886
Income tax effect	332	(15)	194	(310)
Total reclassification adjustments, after tax	(617)	27	(359)	576
Comprehensive income	$ 5,615	$ 18,256	$ 91,998	$ 42,471
Weighted average common shares outstanding (in shares)	25,389,633	25,067,080	25,322,427	25,027,382
Basic earnings per common share (in dollars per share)	$ 0.49	$ 0.78	$ 1.50	$ 2.33
Diluted earnings per common share (in dollars per share)	$ 0.48	$ 0.77	$ 1.47	$ 2.31

Consolidated Statements of Inc5

Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Reclassifications for net unrealized gains on available-for-sale securities	$ 2,320	$ 1,825	$ 4,666	$ 4,715
Reclassification adjustment for employee benefit costs included in expense	1,371	1,867	4,113	5,601
Reclassifications adjustments - tax	$ 332	$ (15)	$ 194	$ (310)

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Total	Common stocks	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income, Net of Tax
Balance, beginning of year at Dec. 31, 2015		$ 878,897	$ 25	$ 207,426	$ 591,009	$ 80,437
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased			0	(2,867)
Shares issued for stock-based awards			0	7,149
Compensation expense and related tax benefit for stock-based award grants				2,249
Net income		37,909			37,909
Dividends on common stock ($0.72 per share)					(18,246)
Change in net unrealized investment appreciation	[1]					51,415
Change in liability for underfunded employee benefit plans	[2]					2,674
All other changes in stockholders’ equity accounts		42,374
Balance, end of period at Sep. 30, 2016		959,180	25	213,957	610,672	134,526
Balance, beginning of year at Jun. 30, 2016						141,279
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		12,368
Balance, end of period at Sep. 30, 2016		$ 959,180	$ 25	$ 213,957	$ 610,672	$ 134,526
[1]	The change in net unrealized appreciation is net of reclassification adjustments and income taxes.
[2]	The change in liability for underfunded employee benefit plans is net of reclassification adjustments and income taxes.

Consolidated Statement of Stoc7

Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Statement of Stockholders' Equity [Abstract]
Stock repurchased (in shares)	67,492
Shares issued for stock-based awards (in shares)	292,440
Dividends on common stock, per share (in dollars per share) | $ / shares	$ 0.72

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows From Operating Activities
Net income	$ 37,909	$ 58,231
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	10,883	10,534
Depreciation and amortization	4,879	7,706
Stock-based compensation expense	2,731	1,817
Net realized investment gains	(6,241)	(2,622)
Net cash flows from trading investments	(36)	2,663
Deferred income tax benefit	(2,187)	(3,854)
Changes in:
Accrued investment income	(1,871)	(304)
Premiums receivable	(54,725)	(46,628)
Deferred policy acquisition costs	(8,831)	(16,884)
Reinsurance receivables	(13,632)	12,395
Prepaid reinsurance premiums	(212)	(266)
Income taxes receivable	(11,732)	(1,928)
Other assets	545	(1,561)
Future policy benefits and losses, claims and loss settlement expenses	128,657	60,932
Unearned premiums	53,688	50,097
Accrued expenses and other liabilities	(6,966)	811
Income taxes payable	(4,917)	(5,012)
Deferred income taxes	2,196	(499)
Other, net	(2,069)	(1,221)
Total adjustments	90,160	66,176
Net cash provided by operating activities	128,069	124,407
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	5,049	8,228
Proceeds from call and maturity of held-to-maturity investments	20	108
Proceeds from call and maturity of available-for-sale investments	428,009	527,365
Proceeds from short-term and other investments	2,235	4,221
Purchase of available-for-sale investments	(446,156)	(502,086)
Purchase of short-term and other investments	(3,091)	(4,643)
Net purchases and sales of property and equipment	(6,090)	(10,763)
Net cash (used in) provided by investing activities	(20,024)	22,430
Policyholders’ account balances
Deposits to investment and universal life contracts	63,967	78,733
Withdrawals from investment and universal life contracts	(123,071)	(175,840)
Payment of cash dividends	(18,246)	(16,024)
Repurchase of common stock	(2,867)	(2,423)
Issuance of common stock	7,149	2,679
Tax impact from issuance of common stock	(482)	(475)
Net cash used in financing activities	(73,550)	(113,350)
Net Change in Cash and Cash Equivalents	34,495	33,487
Cash and Cash Equivalents at Beginning of Period	106,449	90,574
Cash and Cash Equivalents at End of Period	$ 140,944	$ 124,061

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	NATURE OF OPERATIONS AND BASIS OF PRESENTATION Nature of Business United Fire Group, Inc. ("UFG," the "Registrant," the "Company," "we," "us," or "our") and its consolidated subsidiaries and affiliates are engaged in the business of writing property and casualty insurance and life insurance and selling annuities through a network of independent agencies. We report our operations in two business segments: property and casualty insurance and life insurance. Our insurance company subsidiaries are licensed as a property and casualty insurer in 46 states and the District of Columbia, and as a life insurer in 37 states. 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. 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. Certain prior year amounts have been reclassified to conform to the current year presentation. Management of UFG believes the accompanying unaudited Consolidated Financial Statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly the financial position, results of operations and cash flows for the periods presented. All significant intercompany transactions have been eliminated in consolidation. The results reported for the interim periods are not necessarily indicative of the results of operations that may be expected for the year. The unaudited Consolidated Financial Statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2015 . The review report of Ernst & Young LLP as of September 30, 2016 and for the three- and nine-month periods ended September 30, 2016 and 2015 accompanies the unaudited Consolidated Financial Statements included in Part I, Item 1 "Financial Statements." 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. For the nine-month periods ended September 30, 2016 and 2015 , we made payments for income taxes totaling $24,026 and $31,724 , respectively. We did no t receive a tax refund during the nine-month periods ended September 30, 2016 and 2015 . For the nine-month periods ended September 30, 2016 and 2015 , we made no interest payments (excluding interest credited to policyholders’ accounts). Deferred Policy Acquisition Costs ("DAC") 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. The following table is a summary of the components of DAC, including the related amortization recognized for the nine-month period ended September 30, 2016 . Property & Casualty Insurance Life Insurance Total Recorded asset at beginning of period $ 90,547 $ 77,717 $ 168,264 Underwriting costs deferred 161,484 4,279 165,763 Amortization of deferred policy acquisition costs (151,216 ) (5,716 ) (156,932 ) Ending unamortized deferred policy acquisition costs $ 100,815 $ 76,280 $ 177,095 Impact of unrealized gains and losses on available-for-sale securities — (19,857 ) (19,857 ) Recorded asset at September 30, 2016 $ 100,815 $ 56,423 $ 157,238 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. 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. The impact of unrealized gains and losses on available-for-sale securities decreased the DAC asset by $21,860 and $2,003 at September 30, 2016 and December 31, 2015 , respectively. 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 $6,904 and $19,957 for the nine-month periods ended September 30, 2016 and 2015 , 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 positions 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 positions will be sustained, the Company will calculate any unrecognized tax benefits and, if necessary, calculate and accrue any related interest and penalties. We did no t recognize any liability for unrecognized tax benefits at September 30, 2016 or December 31, 2015 . 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. The Company concluded there are no material subsequent events or transactions that have occurred after the balance sheet date through the date on which the financial statements were issued. Recently Issued Accounting Standards Accounting Standards Adopted in 2016 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 include the new annual disclosures beginning with the December 31, 2016 annual financial statements. The adoption of the new guidance will change disclosures regarding short- duration contracts, but 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. Other Internal Use Software In April 2015, the FASB issued guidance which clarifies customers' accounting for fees paid for cloud computing arrangements. The new standard 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 adopted the new guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or 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 adopted the new guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations. Consolidation In February 2015, the FASB issued amendments to the consolidation guidance that a reporting entity follows 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 adopted the guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or 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, 2016 and interim periods within annual periods beginning after December 15, 2016. The Company adopted the guidance as of January 1, 2016. The adoption of the new guidance had no 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 adopted the guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations. Pending Adoption of Accounting Standards Share-Based Payments In March 2016, the FASB issued new guidance on the accounting for share-based payments. The new guidance was issued to simplify the accounting of share-based payments, specifically in the areas of income taxes, classification on the balance sheets as liabilities or equity and classification in the cash flow statement. The new guidance is effective for annual periods beginning after December 15, 2016 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2017 and is currently evaluating the impact on the Company's financial position and results of operations. Income Taxes In December 2015, the FASB issued guidance on the balance sheet classification of deferred taxes. The new guidance eliminates the requirement to split deferred tax liabilities and assets between current and non-current in a classified balance sheet. The new guidance allows deferred tax liabilities and assets to be included in non-current accounts. The Company will adopt the new guidance as of January 1, 2017. The adoption will have no 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 as of January 1, 2018 and is currently evaluating the impact on the Company's financial position and results of operations and considering which portions of the guidance, if any, apply to the Company. Financial Instruments In January 2016, the FASB issued guidance updating certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments in this update supersede the guidance to classify equity securities with readily determinable fair values into different categories (for example, trading or available-for-sale) and require equity securities to be measured at fair value with changes in the fair value recognized through net income. The new guidance also simplifies the impairment process for equity investments without readily determinable fair values. The new guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2018 and is currently evaluating the impact on the Company's financial position and results of operations. Statement of Cash Flows - Classification of Certain Cash Receipts and Payments In August 2016, the FASB issued an update that clarifies the classification of certain cash receipts and payments in the Statement of Cash Flows. The update addresses eight existing cash flow issues by clarifying the correct classification to establish uniformity in practice. The updated guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2018 and is currently evaluating the impact on the Company's financial position and results of operations. Leases In February 2016, the FASB issued guidance on the accounting for leases. The new guidance requires lessees to place most leases on their balance sheets with expenses recognized on the income statement in a similar manner as previous methods. The new guidance is effective for annual periods beginning after December 15, 2018 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2019 and is currently evaluating the impact on the Company's financial position and results of operations. Financial Instruments - Credit Losses In June 2016, the FASB issued new guidance on the measurement of credit losses for most financial instruments. The new guidance replaces the current incurred loss model for recognizing credit losses with an expected loss model for instruments measured at amortized cost and requires allowances to be recorded for available-for-sale debt securities rather than reduce the carrying amount. These allowances will be remeasured each reporting period. The new guidance is effective for annual periods beginning after December 15, 2020 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2021 and is currently evaluating the impact on the Company's financial position and results of operations.

Summary of Investments

Summary of Investments	9 Months Ended
	Sep. 30, 2016
Investments [Abstract]
Summary of Investments	SUMMARY OF INVESTMENTS Fair Value of Investments A reconciliation of the amortized cost (cost for equity securities) to fair value of investments in held-to-maturity and available-for-sale fixed maturity and equity securities as of September 30, 2016 and December 31, 2015 , is as follows: September 30, 2016 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds Technology, media and telecommunications $ 450 $ 2 $ — $ 452 Financial services 150 — — 150 Mortgage-backed securities 52 1 — 53 Total Held-to-Maturity Fixed Maturities $ 652 $ 3 $ — $ 655 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 21,966 $ 281 $ 1 $ 22,246 U.S. government agency 71,717 2,893 3 74,607 States, municipalities and political subdivisions General obligations: Midwest 153,150 5,302 90 158,362 Northeast 58,373 2,836 — 61,209 South 132,843 4,444 314 136,973 West 123,845 4,631 180 128,296 Special revenue: Midwest 161,368 6,799 56 168,111 Northeast 54,109 1,863 98 55,874 South 208,747 7,399 542 215,604 West 100,225 4,069 184 104,110 Foreign bonds 71,011 3,484 894 73,601 Public utilities 217,670 10,539 83 228,126 Corporate bonds Energy 110,345 3,747 187 113,905 Industrials 232,088 12,192 668 243,612 Consumer goods and services 179,502 9,422 — 188,924 Health care 82,497 4,928 — 87,425 Technology, media and telecommunications 141,598 6,225 168 147,655 Financial services 266,576 12,262 20 278,818 Mortgage-backed securities 18,422 465 8 18,879 Collateralized mortgage obligations Government national mortgage association 131,200 4,635 289 135,546 Federal home loan mortgage corporation 153,379 5,626 262 158,743 Federal national mortgage association 105,952 5,439 131 111,260 Asset-backed securities 4,491 318 231 4,578 Total Available-for-Sale Fixed Maturities $ 2,801,074 $ 119,799 $ 4,409 $ 2,916,464 Equity securities: Common stocks Public utilities $ 6,394 $ 13,718 $ 198 $ 19,914 Energy 6,514 7,988 39 14,463 Industrials 13,252 34,387 215 47,424 Consumer goods and services 10,324 15,059 43 25,340 Health care 7,763 21,100 — 28,863 Technology, media and telecommunications 5,931 9,214 37 15,108 Financial services 17,288 82,294 65 99,517 Nonredeemable preferred stocks 443 29 — 472 Total Available-for-Sale Equity Securities $ 67,909 $ 183,789 $ 597 $ 251,101 Total Available-for-Sale Securities $ 2,868,983 $ 303,588 $ 5,006 $ 3,167,565 December 31, 2015 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds Technology, media and telecommunications $ 450 $ 1 $ — $ 451 Financial services 150 — — 150 Mortgage-backed securities 72 2 — 74 Total Held-to-Maturity Fixed Maturities $ 672 $ 3 $ — $ 675 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 21,587 $ 100 $ 38 $ 21,649 U.S. government agency 232,808 2,622 2,400 233,030 States, municipalities and political subdivisions General obligations: Midwest 160,484 4,990 18 165,456 Northeast 56,449 1,996 — 58,445 South 125,565 3,358 134 128,789 West 103,721 3,160 67 106,814 Special revenue: Midwest 152,780 4,956 30 157,706 Northeast 23,892 919 212 24,599 South 144,183 4,281 27 148,437 West 78,935 3,150 44 82,041 Foreign bonds 82,580 2,405 2,457 82,528 Public utilities 213,233 3,701 1,251 215,683 Corporate bonds Energy 116,800 1,032 4,713 113,119 Industrials 227,589 3,329 6,663 224,255 Consumer goods and services 172,529 2,844 776 174,597 Health care 92,132 2,168 791 93,509 Technology, media and telecommunications 142,431 1,972 2,003 142,400 Financial services 259,382 5,246 1,143 263,485 Mortgage-backed securities 16,413 376 51 16,738 Collateralized mortgage obligations Government national mortgage association 120,220 1,391 1,985 119,626 Federal home loan mortgage corporation 137,874 2,377 1,342 138,909 Federal national mortgage association 106,021 2,400 941 107,480 Asset-backed securities 5,461 221 16 5,666 Total Available-for-Sale Fixed Maturities $ 2,793,069 $ 58,994 $ 27,102 $ 2,824,961 Equity securities: Common stocks Public utilities $ 7,231 $ 12,022 $ 193 $ 19,060 Energy 6,103 5,374 266 11,211 Industrials 13,251 31,872 313 44,810 Consumer goods and services 10,301 13,017 3 23,315 Health care 7,763 20,454 — 28,217 Technology, media and telecommunications 5,931 7,538 105 13,364 Financial services 17,392 78,411 109 95,694 Nonredeemable preferred stocks 542 34 — 576 Total Available-for-Sale Equity Securities $ 68,514 $ 168,722 $ 989 $ 236,247 Total Available-for-Sale Securities $ 2,861,583 $ 227,716 $ 28,091 $ 3,061,208 Maturities The amortized cost and fair value of held-to-maturity, available-for-sale and trading fixed maturity securities at September 30, 2016 , by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset-backed securities, mortgage-backed securities and collateralized mortgage obligations may be subject to prepayment risk and are therefore not categorized by contractual maturity. Held-To-Maturity Available-For-Sale Trading September 30, 2016 Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 150 $ 150 $ 99,301 $ 100,197 $ 2,430 $ 2,919 Due after one year through five years 450 452 820,503 851,672 6,036 6,905 Due after five years through 10 years — — 879,226 926,253 961 1,133 Due after 10 years — — 588,600 609,336 2,160 2,296 Asset-backed securities — — 4,491 4,578 — — Mortgage-backed securities 52 53 18,422 18,879 — — Collateralized mortgage obligations — — 390,531 405,549 — — $ 652 $ 655 $ 2,801,074 $ 2,916,464 $ 11,587 $ 13,253 Net Realized Investment Gains and Losses Net realized gains on disposition of investments are computed using the specific identification method and are included in the computation of net income. A summary of the components of net realized investment gains (losses) is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Net realized investment gains (losses) Fixed maturities: Available-for-sale $ 945 $ 407 $ 2,307 $ 2,363 Trading securities Change in fair value 148 (999 ) 519 (1,461 ) Sales 107 531 568 1,230 Equity securities: Available-for-sale 1,375 1,418 2,359 2,352 Trading securities Change in fair value (5 ) (430 ) 325 (634 ) Sales 20 39 (6 ) 85 Other long-term investments — — — (1,313 ) Cash equivalents — — 169 — Total net realized investment gains $ 2,590 $ 966 $ 6,241 $ 2,622 The proceeds and gross realized gains (losses) on the sale of available-for-sale fixed maturity securities are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Proceeds from sales $ 2,007 $ — $ 5,049 $ 8,228 Gross realized gains 11 — 986 1,030 There were no sales of held-to-maturity securities during the three- and nine-month periods ended September 30, 2016 and 2015 . Our investment portfolio includes trading securities with embedded derivatives. These securities are primarily convertible securities which are recorded at fair value. Income or loss, including the change in the fair value of these trading securities, is recognized currently in earnings as a component of net realized investment gains. Our portfolio of trading securities had a fair value of $17,898 and $16,975 at September 30, 2016 and December 31, 2015 , respectively. Funding Commitment Pursuant to an agreement with one of our limited liability partnership investments, we are contractually committed through December 31, 2023 to make capital contributions upon request of the partnership. Our remaining potential contractual obligation was $9,709 at September 30, 2016 . Unrealized Appreciation A summary of the changes in net unrealized investment appreciation during the reporting period is as follows: Nine Months Ended September 30, 2016 2015 Change in net unrealized investment appreciation Available-for-sale fixed maturities $ 83,498 $ (12,841 ) Available-for-sale equity securities 15,459 (19,119 ) Deferred policy acquisition costs (19,857 ) 2,113 Income tax effect (27,685 ) 10,447 Total change in net unrealized investment appreciation, net of tax $ 51,415 $ (19,400 ) We continually monitor the difference between our cost basis and the estimated fair value of our investments. Our accounting policy for impairment recognition requires other-than-temporary impairment ("OTTI") charges to be recorded when we determine that it is more likely than not that we will be unable to collect all amounts due according to the contractual terms of the fixed maturity security or that the anticipated recovery in fair value of the equity security will not occur in a reasonable amount of time. Impairment charges on investments are recorded based on the fair value of the investments at the measurement date or based on the value calculated using a discounted cash flow model. Credit-related impairments on fixed maturity securities that we do not plan to sell, and for which we are not more likely than not to be required to sell, are recognized in net income. Any non-credit related impairment is recognized as a component of other comprehensive income. Factors considered in evaluating whether a decline in value is other-than-temporary include: the length of time and the extent to which fair value has been less than cost; the financial condition and near-term prospects of the issuer; our intention to hold the investment; and the likelihood that we will be required to sell the investment. The tables on the following pages summarize our fixed maturity and equity securities that were in an unrealized loss position at September 30, 2016 and December 31, 2015 . The securities are presented by the length of time they have been continuously in an unrealized loss position. It is possible that we could recognize OTTI charges in future periods on securities held at September 30, 2016 , if future events or information cause us to determine that a decline in fair value is other-than-temporary. We have evaluated the near-term prospects of the issuers of our fixed maturity securities in relation to the severity and duration of the unrealized loss and determined that these losses did not warrant the recognition of an OTTI charge at September 30, 2016 or at September 30, 2015 . We have no intent to sell, and it is more likely than not that we will not be required to sell, these securities until the fair value recovers to at least equal our cost basis or the securities mature. We have evaluated the near-term prospects of the issuers of our equity securities in relation to the severity and duration of the unrealized loss and determined that these losses did not warrant the recognition of an OTTI charge at September 30, 2016 or September 30, 2015 . Our largest unrealized loss greater than 12 months on an individual equity security at September 30, 2016 was $198 . We have no intention to sell any of these securities prior to a recovery in value, but will continue to monitor the fair value reported for these securities as part of our overall process to evaluate investments for OTTI recognition. September 30, 2016 Less than 12 months 12 months or longer Total Type of Investment Number Fair Gross Unrealized Number Fair Gross Unrealized Depreciation Fair Gross Unrealized Depreciation AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury 2 $ 1,625 $ 1 — $ — $ — $ 1,625 $ 1 U.S. government agency 1 3,697 3 — — — 3,697 3 States, municipalities and political subdivisions General obligations Midwest 2 9,909 90 — — — 9,909 90 South 7 16,784 314 — — — 16,784 314 West 6 16,353 180 — — — 16,353 180 Special revenue Midwest 3 6,008 56 — — — 6,008 56 Northeast 6 13,978 98 — — — 13,978 98 South 14 $ 37,375 542 — $ — — $ 37,375 542 West 9 19,130 184 — — — 19,130 184 Foreign bonds — — — 3 6,929 894 6,929 894 Public utilities — — — 5 3,097 83 3,097 83 Corporate bonds Energy 3 5,345 40 4 9,209 147 14,554 187 Industrials — — — 5 9,522 668 9,522 668 Technology, media and telecommunications 1 2,198 8 3 10,403 160 12,601 168 Financial services — — — 2 8,036 20 8,036 20 Mortgage-backed securities — — — 4 1,262 8 1,262 8 Collateralized mortgage obligations Government national mortgage association 5 12,340 88 9 14,097 201 26,437 289 Federal home loan mortgage corporation 7 31,530 175 3 5,977 87 37,507 262 Federal national mortgage association 1 5,001 21 4 4,712 110 9,713 131 Asset-backed securities 1 2,571 231 — — — 2,571 231 Total Available-for-Sale Fixed Maturities 68 $ 183,844 $ 2,031 42 $ 73,244 $ 2,378 $ 257,088 $ 4,409 Equity securities: Common stocks Public utilities — $ — $ — 3 $ 109 $ 198 $ 109 $ 198 Energy 1 150 1 2 339 38 489 39 Industrials — — — 6 197 215 197 215 Consumer goods and services 3 299 39 2 14 4 313 43 Technology, media and telecommunications 4 15 1 11 519 36 534 37 Financial services 1 80 1 4 451 64 531 65 Total Available-for-Sale Equity Securities 9 $ 544 $ 42 28 $ 1,629 $ 555 $ 2,173 $ 597 Total Available-for-Sale Securities 77 $ 184,388 $ 2,073 70 $ 74,873 $ 2,933 $ 259,261 $ 5,006 December 31, 2015 Less than 12 months 12 months or longer Total Type of Investment Number Fair Gross Unrealized Depreciation Number Fair Gross Unrealized Depreciation Fair Gross Unrealized Depreciation AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury 6 $ 6,408 $ 26 2 $ 1,634 $ 12 $ 8,042 $ 38 U.S. government agency 38 104,621 1,771 6 18,821 629 123,442 2,400 States, municipalities and political subdivisions General obligations Midwest 4 2,417 12 1 528 6 2,945 18 South 3 4,805 55 8 3,743 79 8,548 134 West 4 8,927 23 2 2,274 44 11,201 67 Special revenue Midwest — — — 1 2,494 30 2,494 30 Northeast 1 4,755 212 — — — 4,755 212 South 4 7,445 26 2 1,851 1 9,296 27 West 4 6,851 44 — — — 6,851 44 Foreign bonds 9 16,991 1,289 2 4,036 1,168 21,027 2,457 Public utilities 35 72,680 880 5 2,840 371 75,520 1,251 Corporate bonds Energy 29 61,496 3,286 4 7,991 1,427 69,487 4,713 Industrials 38 78,588 3,631 3 6,649 3,032 85,237 6,663 Consumer goods and services 24 64,661 770 4 2,491 6 67,152 776 Health care 18 43,992 652 2 3,737 139 47,729 791 Technology, media and telecommunications 22 59,503 1,478 2 8,940 525 68,443 2,003 Financial services 49 92,814 1,143 — — — 92,814 1,143 Mortgage-backed securities 9 7,423 43 4 183 8 7,606 51 Collateralized mortgage obligations Government national mortgage association 17 29,769 437 14 40,027 1,548 69,796 1,985 Federal home loan mortgage corporation 20 35,343 644 6 19,887 698 55,230 1,342 Federal national mortgage association 15 32,800 524 11 11,962 417 44,762 941 Asset-backed securities 1 985 16 — — — 985 16 Total Available-for-Sale Fixed Maturities 350 $ 743,274 $ 16,962 79 $ 140,088 $ 10,140 $ 883,362 $ 27,102 Equity securities: Common stocks Public utilities — $ — $ — 3 $ 115 $ 193 $ 115 $ 193 Energy 10 2,868 266 — — — 2,868 266 Industrials 3 177 44 5 193 269 370 313 Consumer goods and services — — — 2 14 3 14 3 Technology, media and telecommunications 9 438 91 2 12 14 450 105 Financial services 6 326 51 1 136 58 462 109 Total Available-for-Sale Equity Securities 28 $ 3,809 $ 452 13 $ 470 $ 537 $ 4,279 $ 989 Total Available-for-Sale Securities 378 $ 747,083 $ 17,414 92 $ 140,558 $ 10,677 $ 887,641 $ 28,091

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS Current accounting guidance on fair value measurements includes the application of a fair value hierarchy that requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Our financial instruments that are recorded at fair value are categorized into a three-level hierarchy, which is based upon the priority of the inputs to the valuation technique. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets (i.e., Level 1) and the lowest priority to unobservable inputs (i.e., Level 3). If the inputs used to measure fair value fall within different levels of the hierarchy, the category level is based on the lowest priority level input that is significant to the fair value measurement of the financial instrument. Financial instruments recorded at fair value are categorized in the fair value hierarchy as follows: • Level 1 : Valuations are based on unadjusted quoted prices in active markets for identical financial instruments that we have the ability to access. • Level 2 : Valuations are based on quoted prices for similar financial instruments, other than quoted prices included in Level 1, in markets that are not active or on inputs that are observable either directly or indirectly for the full term of the financial instrument. • Level 3 : Valuations are based on pricing or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement of the financial instrument. Such inputs may reflect management's own assumptions about the assumptions a market participant would use in pricing the financial instrument. We review our fair value hierarchy categorizations on a quarterly basis at which time the classification of certain financial instruments may change if the input observations have changed. Transfers between levels, if any, are recorded as of the beginning of the reporting period. To determine the fair value of the majority of our investments, we utilize prices obtained from independent, nationally recognized pricing services. We obtain one price for each security. When the pricing services cannot provide a determination of fair value for a specific security, we obtain non-binding price quotes from broker-dealers with whom we have had several years experience and who have demonstrated knowledge of the subject security. We request and utilize one broker quote per security. In order to determine the proper classification in the fair value hierarchy for each security where the price is obtained from an independent pricing service, we obtain and evaluate the vendors' pricing procedures and inputs used to price the security, which include unadjusted quoted market prices for identical securities, such as a New York Stock Exchange closing price, and quoted prices for identical securities in markets that are not active. For fixed maturity securities, an evaluation of interest rates and yield curves observable at commonly quoted intervals, volatility, prepayment speeds, credit risks and default rates may also be performed. We have determined that these processes and inputs result in fair values and classifications consistent with the applicable accounting guidance on fair value measurements. We estimate the fair value of our financial instruments based on relevant market information or by discounting estimated future cash flows at estimated current market discount rates appropriate to the specific asset or liability. When possible, we use quoted market prices to determine the fair value of fixed maturities, equity securities, trading securities and short-term investments. When quoted market prices do not exist, we base estimates of fair value on market information obtained from independent pricing services and brokers or on valuation techniques that are both unobservable and significant to the overall fair value measurement of the financial instrument. Such inputs may reflect management's own assumptions about the assumptions a market participant would use in pricing the financial instrument. Our valuation techniques are discussed in more detail throughout this section. The fair value of our mortgage loans is determined by modeling performed by us based on the stated principal and coupon payments provided for in the loan agreements. These cash flows are then discounted using an appropriate risk-adjusted discount rate to determine the security's fair value, which is a Level 3 fair value measurement. The fair value of our policy loans is equivalent to carrying value, which is a reasonable estimate of fair value and is classified as Level 2. We do not make policy loans for amounts in excess of the cash surrender value of the related policy. In all instances, the policy loans are fully collateralized by the related liability for future policy benefits for traditional insurance policies or by the policyholders' account balance for non-traditional policies. Our other long-term investments consist primarily of our interests in limited liability partnerships that are recorded on the equity method of accounting. The fair value of the partnerships is obtained from the fund managers, which is based on the fair value of the underlying investments held in the partnerships. In management's opinion, these values represent a reasonable estimate of fair value. We have not adjusted the net asset value provided by the fund managers. For cash and cash equivalents and accrued investment income, carrying value is a reasonable estimate of fair value due to the short-term nature of these financial instruments. Policy reserves are developed and recorded for deferred annuities, which is an interest-sensitive product, and income annuities. The fair value of the reserve liability for these annuity products is based upon an estimate of the discounted pretax cash flows that are forecast for the underlying business, which is a Level 3 fair value measurement. We base the discount rate on the current U.S. Treasury spot yield curve, which is then risk-adjusted for nonperformance risk and, for interest-sensitive business and market risk factors. The risk-adjusted discount rate is developed using interest rates that are available in the market and representative of the risks applicable to the underlying business. Corporate-Owned Life Insurance The Company formed a rabbi trust in 2014 to fund obligations under the United Fire & Casualty Company Non-qualified Deferred Compensation Plan and United Fire Group Supplemental Executive Retirement and Deferral Plan (collectively the "Executive Retirement Plans"). Within the rabbi trust, corporate-owned life insurance ("COLI") policies are utilized as an investment vehicle and source of funding for the Company's Executive Retirement Plans. The COLI policies invest in mutual funds, which are priced daily by independent sources. As of September 30, 2016 , the cash surrender value of the COLI policies was $2,406 , which is equal to the fair value measured using Level 2 inputs, based on the underlying assets of the COLI policies, and is included in other assets in the Consolidated Balance Sheets. A summary of the carrying value and estimated fair value of our financial instruments at September 30, 2016 and December 31, 2015 is as follows: September 30, 2016 December 31, 2015 Fair Value Carrying Value Fair Value Carrying Value Assets Investments Fixed maturities: Held-to-maturity securities $ 655 $ 652 $ 675 $ 672 Available-for-sale securities 2,916,464 2,916,464 2,824,961 2,824,961 Trading securities 13,253 13,253 12,622 12,622 Equity securities: Available-for-sale securities 251,101 251,101 236,247 236,247 Trading securities 4,645 4,645 4,353 4,353 Mortgage loans 4,063 3,772 4,237 3,961 Policy loans 5,300 5,300 5,618 5,618 Other long-term investments 57,787 57,787 54,151 54,151 Short-term investments 175 175 175 175 Cash and cash equivalents 140,944 140,944 106,449 106,449 Corporate-owned life insurance 2,406 2,406 1,716 1,716 Liabilities Policy reserves Annuity (accumulations) (1) $ 702,251 $ 685,591 $ 707,190 $ 744,931 Annuity (benefit payments) 142,013 95,798 131,899 95,467 (1) Annuity accumulations represent deferred annuity contracts that are currently earning interest. The following tables present the categorization for our financial instruments measured at fair value on a recurring basis in our Consolidated Balance Sheets at September 30, 2016 and December 31, 2015 : September 30, 2016 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 22,246 $ — $ 22,246 $ — U.S. government agency 74,607 — 74,607 — States, municipalities and political subdivisions General obligations Midwest 158,362 — 158,362 — Northeast 61,209 — 61,209 — South 136,973 — 136,973 — West 128,296 — 128,296 — Special revenue Midwest 168,111 — 167,857 254 Northeast 55,874 — 55,874 — South 215,604 — 215,604 — West 104,110 — 104,110 — Foreign bonds 73,601 — 73,601 — Public utilities 228,126 — 228,126 — Corporate bonds Energy 113,905 — 113,905 — Industrials 243,612 — 243,612 — Consumer goods and services 188,924 — 187,779 1,145 Health care 87,425 — 87,425 — Technology, media and telecommunications 147,655 — 147,655 — Financial services 278,818 — 269,636 9,182 Mortgage-backed securities 18,879 — 18,879 — Collateralized mortgage obligations Government national mortgage association 135,546 — 135,546 — Federal home loan mortgage corporation 158,743 — 158,743 — Federal national mortgage association 111,260 — 111,260 — Asset-backed securities 4,578 — 3,906 672 Total Available-for-Sale Fixed Maturities $ 2,916,464 $ — $ 2,905,211 $ 11,253 Equity securities: Common stocks Public utilities $ 19,914 $ 19,914 $ — $ — Energy 14,463 14,463 — — Industrials 47,424 47,424 — — Consumer goods and services 25,340 25,340 — — Health care 28,863 28,863 — — Technology, media and telecommunications 15,108 15,108 — — Financial services 99,517 95,525 — 3,992 Nonredeemable preferred stocks 472 472 — — Total Available-for-Sale Equity Securities $ 251,101 $ 247,109 $ — $ 3,992 Total Available-for-Sale Securities $ 3,167,565 $ 247,109 $ 2,905,211 $ 15,245 TRADING Fixed maturities: Corporate bonds Industrials $ 3,833 $ — $ 3,833 $ — Consumer goods and services 538 — 538 — Health care 2,794 — 2,794 — Technology, media and telecommunications 810 — 810 — Financial services 4,155 — 4,155 — Asset-backed securities — — — — Redeemable preferred stocks 1,123 1,123 — — Equity securities: Public utilities 594 594 — — Energy 287 287 — — Industrials 812 812 — — Consumer goods and services 788 788 — — Health care 361 361 — — Financial services 232 232 — — Nonredeemable preferred stocks 1,571 1,571 — — Total Trading Securities $ 17,898 $ 5,768 $ 12,130 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 58,262 $ 58,262 $ — $ — Corporate-Owned Life Insurance $ 2,406 $ — $ 2,406 $ — Total Assets Measured at Fair Value $ 3,246,306 $ 311,314 $ 2,919,747 $ 15,245 December 31, 2015 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 21,649 $ — $ 21,649 $ — U.S. government agency 233,030 — 233,030 — States, municipalities and political subdivisions General obligations Midwest 165,456 — 165,456 — Northeast 58,445 — 58,445 — South 128,789 — 128,789 — West 106,814 — 106,814 — Special revenue Midwest 157,706 — 157,363 343 Northeast 24,599 — 24,599 — South 148,437 — 148,437 — West 82,041 — 82,041 — Foreign bonds 82,528 — 82,528 — Public utilities 215,683 — 215,683 — Corporate bonds Energy 113,119 — 113,119 — Industrials 224,255 — 224,255 — Consumer goods and services 174,597 — 173,364 1,233 Health care 93,509 — 93,509 — Technology, media and telecommunications 142,400 — 142,400 — Financial services 263,485 — 253,823 9,662 Mortgage-backed securities 16,738 — 16,738 — Collateralized mortgage obligations Government national mortgage association 119,626 — 119,626 — Federal home loan mortgage corporation 138,909 — 138,909 — Federal national mortgage association 107,480 — 107,480 — Asset-backed securities 5,666 — 4,630 1,036 Total Available-for-Sale Fixed Maturities $ 2,824,961 $ — $ 2,812,687 $ 12,274 Equity securities: Common stocks Public utilities $ 19,060 $ 19,060 $ — $ — Energy 11,211 11,211 — — Industrials 44,810 44,810 — — Consumer goods and services 23,315 23,315 — — Health care 28,217 28,217 — — Technology, media and telecommunications 13,364 13,364 — — Financial services 95,694 91,588 128 3,978 Nonredeemable preferred stocks 576 576 — — Total Available-for-Sale Equity Securities $ 236,247 $ 232,141 $ 128 $ 3,978 Total Available-for-Sale Securities $ 3,061,208 $ 232,141 $ 2,812,815 $ 16,252 TRADING Fixed maturities: Bonds Corporate bonds Industrials $ 3,558 $ — $ 3,558 $ — Consumer goods and services 118 — 118 — Health care 2,032 — 2,032 — Technology, media and telecommunications 335 — 335 — Financial services 4,094 — 4,094 — Redeemable preferred stocks 2,485 2,485 — — Equity securities: Energy 267 267 — — Industrials 986 986 — — Consumer goods and services 942 942 — — Health care 304 304 — — Financial services 229 229 — — Nonredeemable preferred stocks 1,625 1,625 — — Total Trading Securities $ 16,975 $ 6,838 $ 10,137 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 20,805 $ 20,805 $ — $ — Corporate-Owned Life Insurance $ 1,716 $ — $ 1,716 $ — Total Assets Measured at Fair Value $ 3,100,879 $ 259,959 $ 2,824,668 $ 16,252 The fair value of securities that are categorized as Level 1 is based on quoted market prices that are readily and regularly available. We use a market-based approach for valuing all of our Level 2 securities and submit them primarily to a third-party valuation service provider. Any of these securities not valued by this service provider are submitted to another third-party valuation service provider. Both service providers use a market approach to find pricing of similar financial instruments. The market inputs our service providers normally seek to value our securities include the following, listed in approximate order of priority: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including market research publications. The method and inputs for these securities classified as Level 2 are the same regardless of industry category, credit quality, duration, geographical concentration or economic characteristics. For our mortgage-backed securities, collateralized mortgage obligations and asset-backed securities, our service providers use additional market inputs to value these securities, including the following: new issue data, periodic payment information, monthly payment information, collateral performance and real estate analysis from third parties. Our service providers prioritize inputs based on market conditions, and not all inputs listed are available for use in the valuation process for each security on any given day. At least annually, we review the methodologies and assumptions used by our valuation service providers and verify that they are reasonable and representative of the fair value of the underlying securities held in the investment portfolio. We validate the prices obtained from independent pricing services and brokers prior to their use for reporting purposes by evaluating their reasonableness on a monthly basis. Our validation process includes a review for unusual fluctuations. Unusual fluctuations outside of our expectations are independently corroborated with additional third-party sources that use similar valuation techniques as discussed above. In addition, we also randomly select securities and independently corroborate the valuations obtained from our third-party valuation service providers. In our opinion, the pricing obtained at September 30, 2016 and December 31, 2015 was reasonable. For the three- and nine-month periods ended September 30, 2016 , the change in our available-for-sale securities categorized as Level 1 and Level 2 is the result of investment purchases that were made using funds held in our money market accounts, disposals and the change in unrealized gains on both fixed maturities and equity securities. During the three- and nine-month periods ended September 30, 2016 , there were no securities transferred between Level 1 and Level 2. Securities categorized as Level 3 include holdings in certain private placement fixed maturity and equity securities for which an active market does not currently exist. The fair value of our Level 3 private placement securities is determined by management relying on pricing received from our independent pricing services and brokers consistent with the process to estimate fair value for Level 2 securities. However, securities are categorized as Level 3 if these quotes cannot be corroborated by other market observable data due to the unobservable nature of the brokers’ valuation processes. If pricing cannot be obtained from these sources, which occurs on a limited basis, management will perform a discounted cash flow analysis, using an appropriate risk-adjusted discount rate, on the underlying security to estimate fair value. During the three- and nine-month periods ended September 30, 2016 , there were no securities transferred in or out of Level 3. The following table provides a summary of the changes in fair value of our Level 3 securities for the three-month period ended September 30, 2016 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at June 30, 2016 $ 254 $ 10,500 $ 807 $ 3,992 $ 15,553 Net unrealized gains (losses) (1) — 156 22 — 178 Disposals — (329 ) (157 ) — (486 ) Balance at September 30, 2016 $ 254 $ 10,327 $ 672 $ 3,992 $ 15,245 (1) Unrealized gains (losses) are recorded as a component of comprehensive income. The following table provides a summary of the changes in fair value of our Level 3 securities for the nine-month period ended September 30, 2016 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at January 1, 2016 $ 343 $ 10,895 $ 1,036 $ 3,978 $ 16,252 Net unrealized gains (losses) (1) (9 ) 318 91 — 400 Purchases — — — 132 132 Disposals (80 ) (886 ) (455 ) (118 ) (1,539 ) Balance at September 30, 2016 $ 254 $ 10,327 $ 672 $ 3,992 $ 15,245 (1) Unrealized gains (losses) are recorded as a component of comprehensive income. The fixed maturities reported as disposals relate to the receipt of principal on calls or sinking fund bonds, in accordance with the indentures.

Employee Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefits	EMPLOYEE BENEFITS Net Periodic Benefit Cost The components of the net periodic benefit cost for our pension and postretirement benefit plans are as follows: Pension Plan Postretirement Benefit Plan Three Months Ended September 30, 2016 2015 2016 2015 Net periodic benefit cost Service cost $ 1,623 $ 1,669 $ 932 $ 1,305 Interest cost 1,663 1,500 754 713 Expected return on plan assets (1,988 ) (1,950 ) — — Amortization of net loss 992 1,136 379 731 Net periodic benefit cost $ 2,290 $ 2,355 $ 2,065 $ 2,749 Pension Plan Postretirement Benefit Plan Nine Months Ended September 30, 2016 2015 2016 2015 Net periodic benefit cost Service cost $ 4,869 $ 5,007 $ 2,796 $ 3,915 Interest cost 4,989 4,500 2,262 2,139 Expected return on plan assets (5,964 ) (5,850 ) — — Amortization of net loss 2,976 3,408 1,137 2,193 Net periodic benefit cost $ 6,870 $ 7,065 $ 6,195 $ 8,247 Employer Contributions We previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2015 that we expected to contribute $6,384 to the pension plan in 2016 . For the nine-month period ended September 30, 2016 , we contributed $16,383 to the pension plan. In September 2016, the Company contributed an additional $10,000 to the pension plan for tax advantages and to reduce future obligations.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2016
Share-based Compensation [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION Non-qualified Employee Stock Award Plan The United Fire Group, Inc. 2008 Stock Plan (the "2008 Stock Plan") authorized the issuance of restricted and unrestricted stock awards, restricted stock units, stock appreciation rights, incentive stock options, and non-qualified stock options for up to 1,900,000 shares of UFG common stock to employees. In May 2014, the Registrant's shareholders approved an additional 1,500,000 shares of UFG common stock issuable at any time and from time to time pursuant to the 2008 Stock Plan, among other amendments, and renamed such plan as the United Fire Group, Inc. Stock Plan (as amended, the "Stock Plan"). At September 30, 2016 , there were 1,245,650 authorized shares remaining available for future issuance. The Stock Plan is administered by the Board of Directors, which determines those employees who will receive awards, when awards will be granted, and the terms and conditions of the awards. The Board of Directors may also take any action it deems necessary and appropriate for the administration of the Stock Plan. Pursuant to the Stock Plan, the Board of Directors may, at its sole discretion, grant awards to our employees who are in positions of substantial responsibility with UFG. Options granted pursuant to the Stock Plan are granted to buy shares of UFG's common stock at the market value of the stock on the date of grant. All outstanding option awards vest and are exercisable in installments of 20.0 percent of the number of shares covered by the option award each year from the grant date, unless the Board of Directors authorizes the acceleration of vesting. To the extent not exercised, vested option awards accumulate and are exercisable by the awardee, in whole or in part, in any subsequent year included in the option period, but not later than 10 years from the grant date. Restricted and unrestricted stock awards granted pursuant to the Stock Plan are granted at the market value of our common stock on the date of the grant. Restricted stock units fully vest after 3 years or 5 years from the date of issuance, unless accelerated upon the approval of the Board of Directors, at which time UFG common stock will be issued to the awardee. The activity in the Stock Plan is displayed in the following table: Authorized Shares Available for Future Award Grants Nine Months Ended September 30, 2016 From Inception to September 30, 2016 Beginning balance 1,394,578 1,900,000 Additional shares authorized — 1,500,000 Number of awards granted (249,528 ) (2,612,456 ) Number of awards forfeited or expired 100,600 458,106 Ending balance 1,245,650 1,245,650 Number of option awards exercised 209,352 859,871 Number of unrestricted stock awards granted 870 7,215 Number of restricted stock awards vested 18,394 36,970 Non-qualified Non-employee Director Stock Option and Restricted Stock Plan The United Fire Group, Inc. 2005 Non-Qualified Non-Employee Director Stock Option and Restricted Stock Plan (the "Director Plan") authorizes the issuance of restricted stock awards and non-qualified stock options to purchase shares of UFG's common stock to non-employee directors. At September 30, 2016 , we had 74,771 authorized shares available for future issuance. The Board of Directors has the authority to determine which non-employee directors receive awards, when options and restricted stock shall be granted, the option price, the option expiration date, the date of grant, the vesting schedule of options or whether the options shall be immediately vested, the terms and conditions of options and restricted stock (other than those terms and conditions set forth in the plan) and the number of shares of common stock to be issued pursuant to an option agreement or restricted stock agreement (subject to limits set forth in the plan). The Board of Directors may also take any action it deems necessary and appropriate for the administration of the Director Plan. The activity in the Director Plan is displayed in the following table: Authorized Shares Available for Future Award Grants Nine Months Ended September 30, 2016 From Inception to September 30, 2016 Beginning balance 69,938 300,000 Number of awards granted (13,167 ) (249,232 ) Number of awards forfeited or expired 18,000 24,003 Ending balance 74,771 74,771 Number of option awards exercised 31,886 46,693 Number of restricted stock awards vested 11,385 31,556 Stock-Based Compensation Expense For the three-month periods ended September 30, 2016 and 2015 , we recognized stock-based compensation expense of $865 and $616 , respectively. For the nine-month periods ended September 30, 2016 and 2015 , we recognized stock-based compensation expense of $2,731 and $1,817 , respectively. Stock-based compensation expense is recognized over the vesting period of the stock options. As of September 30, 2016 , we had $8,000 in stock-based compensation expense that has yet to be recognized through our results of operations. We expect this compensation to be recognized over the remainder of 2016 and subsequent years according to the following table, except with respect to awards that are accelerated by the Board of Directors, in which case we will recognize any remaining compensation expense in the period in which the awards are accelerated. 2016 $ 865 2017 2,964 2018 2,264 2019 1,194 2020 640 2021 73 Total $ 8,000

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We have two reportable business segments in our operations: property and casualty insurance and life insurance. The property and casualty insurance segment has seven domestic locations from which it conducts its business. The life insurance segment operates from our home office in Cedar Rapids, Iowa. Because all of our insurance is sold domestically, we have no revenues from foreign operations. We evaluate the two segments on the basis of both statutory accounting principles prescribed or permitted by our states of domicile and GAAP. We analyze results based on profitability (i.e., loss ratios), expenses, and return on equity. The basis we use to determine and analyze segments and to measure segment profit or loss have not changed from that reported in our Annual Report on Form 10-K for the year ended December 31, 2015 . We have reconciled the amounts in the following table for the three-month periods ended September 30, 2016 and 2015 to the amounts reported in our unaudited Consolidated Financial Statements, adjusting for intersegment eliminations. Property and Casualty Insurance Life Insurance Total As of and for the Three Months Ended September 30, 2016 Net premiums earned $ 239,469 $ 20,600 $ 260,069 Investment income, net of investment expenses 14,065 12,663 26,728 Net realized investment gains 2,129 461 2,590 Other income — 145 145 Total reportable segment $ 255,663 $ 33,869 $ 289,532 Intersegment eliminations (38 ) — (38 ) Total revenues $ 255,625 $ 33,869 $ 289,494 Net income $ 11,628 $ 740 $ 12,368 Assets $ 2,468,258 $ 1,638,779 $ 4,107,037 Invested assets $ 1,735,153 $ 1,517,996 $ 3,253,149 As of and for the Three Months Ended September 30, 2015 Net premiums earned $ 218,993 $ 20,627 $ 239,620 Investment income, net of investment expenses 10,741 13,334 24,075 Net realized investment gains 732 234 966 Other income — 123 123 Total reportable segment $ 230,466 $ 34,318 $ 264,784 Intersegment eliminations (25 ) (199 ) (224 ) Total revenues $ 230,441 $ 34,119 $ 264,560 Net income $ 18,020 $ 1,514 $ 19,534 Assets $ 2,231,851 $ 1,644,165 $ 3,876,016 Invested assets $ 1,572,222 $ 1,524,232 $ 3,096,454 We have reconciled the amounts in the following table for the nine-month periods ended September 30, 2016 and 2015 to the amounts reported in our unaudited Consolidated Financial Statements, adjusting for intersegment eliminations. Property and Casualty Insurance Life Insurance Total As of and for the Nine Months Ended September 30, 2016 Net premiums earned $ 691,976 $ 62,878 $ 754,854 Investment income, net of investment expenses 35,129 38,404 73,533 Net realized investment gains 4,832 1,409 6,241 Other income — 436 436 Total reportable segment $ 731,937 $ 103,127 $ 835,064 Intersegment eliminations (112 ) — (112 ) Total revenues $ 731,825 $ 103,127 $ 834,952 Net income $ 37,083 $ 826 $ 37,909 Assets $ 2,468,258 $ 1,638,779 $ 4,107,037 Invested assets $ 1,735,153 $ 1,517,996 $ 3,253,149 As of and for the Nine Months Ended September 30, 2015 Net premiums earned $ 628,396 $ 54,009 $ 682,405 Investment income, net of investment expenses 33,610 40,623 74,233 Net realized investment gains 316 2,306 2,622 Other income — 318 318 Total reportable segment $ 662,322 $ 97,256 $ 759,578 Intersegment eliminations (28 ) (588 ) (616 ) Total revenues $ 662,294 $ 96,668 $ 758,962 Net income $ 54,420 $ 3,811 $ 58,231 Assets $ 2,231,851 $ 1,644,165 $ 3,876,016 Invested assets $ 1,572,222 $ 1,524,232 $ 3,096,454

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Common Share	EARNINGS PER COMMON SHARE Basic earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the reporting period. Diluted earnings per share gives effect to all dilutive common shares outstanding during the reporting period. The dilutive shares we consider in our diluted earnings per share calculation relate to our outstanding stock options, restricted stock awards and restricted stock unit awards. We determine the dilutive effect of our outstanding stock options using the "treasury stock" method. Under this method, we assume the exercise of all of the outstanding stock options whose exercise price is less than the weighted-average market value of our common stock during the reporting period. This method also assumes that the proceeds from the hypothetical stock option exercises are used to repurchase shares of our common stock at the weighted-average market value of the stock during the reporting period. The net of the assumed stock options exercised and assumed common shares repurchased represents the number of dilutive common shares, which we add to the denominator of the earnings per share calculation. The components of basic and diluted earnings per share were as follows for the three-month periods ended September 30, 2016 and 2015 : Three Months Ended September 30, (In Thousands Except Share Data) 2016 2015 Basic Diluted Basic Diluted Net income $ 12,368 $ 12,368 $ 19,534 $ 19,534 Weighted-average common shares outstanding 25,389,633 25,389,633 25,067,080 25,067,080 Add dilutive effect of restricted stock unit awards — 155,270 — 125,135 Add dilutive effect of stock options — 270,443 — 187,133 Weighted-average common shares 25,389,633 25,815,346 25,067,080 25,379,348 Earnings per common share $ 0.49 $ 0.48 $ 0.78 $ 0.77 Awards excluded from diluted earnings per share calculation (1) — — — 260,035 (1) Outstanding awards that are not "in-the-money" are excluded from the diluted earnings per share calculation because the effect of including them would have been anti-dilutive. The components of basic and diluted earnings per share were as follows for the nine-month periods ended September 30, 2016 and 2015 : Nine Months Ended September 30, (In Thousands Except Share Data) 2016 2015 Basic Diluted Basic Diluted Net income $ 37,909 $ 37,909 $ 58,231 $ 58,231 Weighted-average common shares outstanding 25,322,427 25,322,427 25,027,382 25,027,382 Add dilutive effect of restricted stock unit awards — 155,270 — 125,135 Add dilutive effect of stock options — 233,317 — 19,364 Weighted-average common shares 25,322,427 25,711,014 25,027,382 25,171,881 Earnings per common share $ 1.50 $ 1.47 $ 2.33 $ 2.31 Awards excluded from diluted earnings per share calculation (1) — — — 410,425 (1) Outstanding awards that are not "in-the-money" are excluded from the diluted earnings per share calculation because the effect of including them would have been anti-dilutive.

Credit Facility

Credit Facility	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Credit Facility	CREDIT FACILITY On February 2, 2016, the Company, as borrower, entered into a Credit Agreement (the "New Credit Agreement") by and among the Company, with the lenders from time to time party thereto and KeyBank National Association ("Key Bank"), as administrative agent, swingline lender and letter of credit issuer. The New Credit Agreement provides for a $50,000 four -year unsecured revolving credit facility that includes a $20,000 letter of credit subfacility and a swingline subfacility in the amount up to $5,000 . The New Credit Agreement allows the Company to increase the aggregate amount of the commitments thereunder by up to $100,000 , provided that no event of default has occurred and is continuing and certain other conditions are satisfied. The New Credit Agreement is available for the Company's general corporate purposes, including liquidity, acquisitions and working capital. All unpaid principal and accrued interest under the New Credit Agreement is due and payable in full at maturity on February 2, 2020. Based on the type of loan, advances under the New Credit Agreement would bear interest on either the London interbank offered rate ("LIBOR") or a base rate plus, in each case, a calculated margin amount. The unused commitments under the New Credit Agreement will be subject to a commitment fee that will be calculated at a per annum rate. The applicable margins for borrowings under the New Credit Agreement and the commitment fee thereunder will be determined by reference to a pricing grid based on the Company’s issuer credit rating by A.M. Best Company, Inc. The New Credit Agreement contains customary representations, conditions to borrowing, covenants and events of default, including certain covenants that limit or restrict, subject to certain exceptions, the ability of the Company and its subsidiaries to sell or transfer assets, enter into a merger or consolidate with another company, create liens, impose restrictions on subsidiary dividends, enter into sale-leaseback transactions, make investments or acquisitions, enter into certain reinsurance agreements, pay dividends during any period of default, enter into transactions with affiliates, change the nature of its business, or incur indebtedness. The New Credit Agreement also includes financial covenants that require the Company to (i) maintain a minimum consolidated net worth, (ii) maintain a minimum consolidated statutory surplus and (iii) not exceed a 0.35 to 1.0 debt to total capitalization ratio. Prior to December 22, 2015, the Company had a credit agreement (the "Previous Credit Agreement") with a syndicate of financial institutions as lenders. KeyBank National Association was the administrative agent, lead arranger, sole book runner, swingline lender, and letter of credit issuer, and Bankers Trust Company was the syndication agent. The Previous Credit Agreement provided for a $100,000 unsecured revolving credit facility that included a $20,000 letter of credit subfacility and a swingline subfacility of up to $5,000 . The Previous Credit Agreement terminated by expiration on its stated termination date of December 22, 2015. There was no outstanding balance on either the New Credit Agreement or Previous Credit Agreement at September 30, 2016 and 2015 , respectively. For the nine-month periods ended September 30, 2016 and 2015 , we did no t incur any interest expense related to either credit facility. We were in compliance with all covenants of the New Credit Agreement at September 30, 2016 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Accumulated Other Comprehensive Income	ACCUMULATED OTHER COMPREHENSIVE INCOME The following table shows the changes in the components of our accumulated other comprehensive income (loss), net of tax, for the three-month period ended September 30, 2016 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of June 30, 2016 $ 187,428 $ (46,149 ) $ 141,279 Change in accumulated other comprehensive income before reclassifications (6,136 ) — (6,136 ) Reclassification adjustments from accumulated other comprehensive income (loss) (1,508 ) 891 (617 ) Balance as of September 30, 2016 $ 179,784 $ (45,258 ) $ 134,526 (1) Estimates and Assumptions: The preparation of financial statements in conformity with GAAP requires us to make various estimates and assumptions that affect the reporting of net periodic benefit cost, plan assets and plan obligations for each plan at the date of the financial statements. Actual results could differ from these estimates. One significant estimate relates to the calculation of the benefit obligation for each plan. We annually establish the discount rate, which is an estimate of the interest rate at which these benefits could be effectively settled, that is used to determine the present value of the respective plan's benefit obligations as of December 31. The following table shows the changes in the components of our accumulated other comprehensive income (loss), net of tax, for the nine-month period ended September 30, 2016 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of January 1, 2016 $ 128,369 $ (47,932 ) $ 80,437 Change in accumulated other comprehensive income before reclassifications 54,448 — 54,448 Reclassification adjustments from accumulated other comprehensive income (loss) (3,033 ) 2,674 (359 ) Balance as of September 30, 2016 $ 179,784 $ (45,258 ) $ 134,526 (1) Estimates and Assumptions: The preparation of financial statements in conformity with GAAP requires us to make various estimates and assumptions that affect the reporting of net periodic benefit cost, plan assets and plan obligations for each plan at the date of the financial statements. Actual results could differ from these estimates. One significant estimate relates to the calculation of the benefit obligation for each plan. We annually establish the discount rate, which is an estimate of the interest rate at which these benefits could be effectively settled, that is used to determine the present value of the respective plan's benefit obligations as of December 31.

Nature of Operations and Basi18

Nature of Operations and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	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.
Reclassification	Certain prior year amounts have been reclassified to conform to the current year presentation.
Cash and Cash Equivalents	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)	Deferred Policy Acquisition Costs ("DAC") 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. The following table is a summary of the components of DAC, including the related amortization recognized for the nine-month period ended September 30, 2016 . Property & Casualty Insurance Life Insurance Total Recorded asset at beginning of period $ 90,547 $ 77,717 $ 168,264 Underwriting costs deferred 161,484 4,279 165,763 Amortization of deferred policy acquisition costs (151,216 ) (5,716 ) (156,932 ) Ending unamortized deferred policy acquisition costs $ 100,815 $ 76,280 $ 177,095 Impact of unrealized gains and losses on available-for-sale securities — (19,857 ) (19,857 ) Recorded asset at September 30, 2016 $ 100,815 $ 56,423 $ 157,238 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. 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.
Income Taxes	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 $6,904 and $19,957 for the nine-month periods ended September 30, 2016 and 2015 , 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 positions 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 positions will be sustained, the Company will calculate any unrecognized tax benefits and, if necessary, calculate and accrue any related interest and penalties. We did no t recognize any liability for unrecognized tax benefits at September 30, 2016 or December 31, 2015 . 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	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	Recently Issued Accounting Standards Accounting Standards Adopted in 2016 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 include the new annual disclosures beginning with the December 31, 2016 annual financial statements. The adoption of the new guidance will change disclosures regarding short- duration contracts, but 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. Other Internal Use Software In April 2015, the FASB issued guidance which clarifies customers' accounting for fees paid for cloud computing arrangements. The new standard 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 adopted the new guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or 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 adopted the new guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations. Consolidation In February 2015, the FASB issued amendments to the consolidation guidance that a reporting entity follows 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 adopted the guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or 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, 2016 and interim periods within annual periods beginning after December 15, 2016. The Company adopted the guidance as of January 1, 2016. The adoption of the new guidance had no 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 adopted the guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations. Pending Adoption of Accounting Standards Share-Based Payments In March 2016, the FASB issued new guidance on the accounting for share-based payments. The new guidance was issued to simplify the accounting of share-based payments, specifically in the areas of income taxes, classification on the balance sheets as liabilities or equity and classification in the cash flow statement. The new guidance is effective for annual periods beginning after December 15, 2016 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2017 and is currently evaluating the impact on the Company's financial position and results of operations. Income Taxes In December 2015, the FASB issued guidance on the balance sheet classification of deferred taxes. The new guidance eliminates the requirement to split deferred tax liabilities and assets between current and non-current in a classified balance sheet. The new guidance allows deferred tax liabilities and assets to be included in non-current accounts. The Company will adopt the new guidance as of January 1, 2017. The adoption will have no 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 as of January 1, 2018 and is currently evaluating the impact on the Company's financial position and results of operations and considering which portions of the guidance, if any, apply to the Company. Financial Instruments In January 2016, the FASB issued guidance updating certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments in this update supersede the guidance to classify equity securities with readily determinable fair values into different categories (for example, trading or available-for-sale) and require equity securities to be measured at fair value with changes in the fair value recognized through net income. The new guidance also simplifies the impairment process for equity investments without readily determinable fair values. The new guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2018 and is currently evaluating the impact on the Company's financial position and results of operations. Statement of Cash Flows - Classification of Certain Cash Receipts and Payments In August 2016, the FASB issued an update that clarifies the classification of certain cash receipts and payments in the Statement of Cash Flows. The update addresses eight existing cash flow issues by clarifying the correct classification to establish uniformity in practice. The updated guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2018 and is currently evaluating the impact on the Company's financial position and results of operations. Leases In February 2016, the FASB issued guidance on the accounting for leases. The new guidance requires lessees to place most leases on their balance sheets with expenses recognized on the income statement in a similar manner as previous methods. The new guidance is effective for annual periods beginning after December 15, 2018 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2019 and is currently evaluating the impact on the Company's financial position and results of operations. Financial Instruments - Credit Losses In June 2016, the FASB issued new guidance on the measurement of credit losses for most financial instruments. The new guidance replaces the current incurred loss model for recognizing credit losses with an expected loss model for instruments measured at amortized cost and requires allowances to be recorded for available-for-sale debt securities rather than reduce the carrying amount. These allowances will be remeasured each reporting period. The new guidance is effective for annual periods beginning after December 15, 2020 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2021 and is currently evaluating the impact on the Company's financial position and results of operations.

Nature of Operations and Basi19

Nature of Operations and Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Components of Deferred Acquisition Costs	The following table is a summary of the components of DAC, including the related amortization recognized for the nine-month period ended September 30, 2016 . Property & Casualty Insurance Life Insurance Total Recorded asset at beginning of period $ 90,547 $ 77,717 $ 168,264 Underwriting costs deferred 161,484 4,279 165,763 Amortization of deferred policy acquisition costs (151,216 ) (5,716 ) (156,932 ) Ending unamortized deferred policy acquisition costs $ 100,815 $ 76,280 $ 177,095 Impact of unrealized gains and losses on available-for-sale securities — (19,857 ) (19,857 ) Recorded asset at September 30, 2016 $ 100,815 $ 56,423 $ 157,238

Summary of Investments (Tables)

Summary of Investments (Tables)	9 Months Ended
	Sep. 30, 2016
Investments [Abstract]
Fair Value of Investments	A reconciliation of the amortized cost (cost for equity securities) to fair value of investments in held-to-maturity and available-for-sale fixed maturity and equity securities as of September 30, 2016 and December 31, 2015 , is as follows: September 30, 2016 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds Technology, media and telecommunications $ 450 $ 2 $ — $ 452 Financial services 150 — — 150 Mortgage-backed securities 52 1 — 53 Total Held-to-Maturity Fixed Maturities $ 652 $ 3 $ — $ 655 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 21,966 $ 281 $ 1 $ 22,246 U.S. government agency 71,717 2,893 3 74,607 States, municipalities and political subdivisions General obligations: Midwest 153,150 5,302 90 158,362 Northeast 58,373 2,836 — 61,209 South 132,843 4,444 314 136,973 West 123,845 4,631 180 128,296 Special revenue: Midwest 161,368 6,799 56 168,111 Northeast 54,109 1,863 98 55,874 South 208,747 7,399 542 215,604 West 100,225 4,069 184 104,110 Foreign bonds 71,011 3,484 894 73,601 Public utilities 217,670 10,539 83 228,126 Corporate bonds Energy 110,345 3,747 187 113,905 Industrials 232,088 12,192 668 243,612 Consumer goods and services 179,502 9,422 — 188,924 Health care 82,497 4,928 — 87,425 Technology, media and telecommunications 141,598 6,225 168 147,655 Financial services 266,576 12,262 20 278,818 Mortgage-backed securities 18,422 465 8 18,879 Collateralized mortgage obligations Government national mortgage association 131,200 4,635 289 135,546 Federal home loan mortgage corporation 153,379 5,626 262 158,743 Federal national mortgage association 105,952 5,439 131 111,260 Asset-backed securities 4,491 318 231 4,578 Total Available-for-Sale Fixed Maturities $ 2,801,074 $ 119,799 $ 4,409 $ 2,916,464 Equity securities: Common stocks Public utilities $ 6,394 $ 13,718 $ 198 $ 19,914 Energy 6,514 7,988 39 14,463 Industrials 13,252 34,387 215 47,424 Consumer goods and services 10,324 15,059 43 25,340 Health care 7,763 21,100 — 28,863 Technology, media and telecommunications 5,931 9,214 37 15,108 Financial services 17,288 82,294 65 99,517 Nonredeemable preferred stocks 443 29 — 472 Total Available-for-Sale Equity Securities $ 67,909 $ 183,789 $ 597 $ 251,101 Total Available-for-Sale Securities $ 2,868,983 $ 303,588 $ 5,006 $ 3,167,565 December 31, 2015 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds Technology, media and telecommunications $ 450 $ 1 $ — $ 451 Financial services 150 — — 150 Mortgage-backed securities 72 2 — 74 Total Held-to-Maturity Fixed Maturities $ 672 $ 3 $ — $ 675 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 21,587 $ 100 $ 38 $ 21,649 U.S. government agency 232,808 2,622 2,400 233,030 States, municipalities and political subdivisions General obligations: Midwest 160,484 4,990 18 165,456 Northeast 56,449 1,996 — 58,445 South 125,565 3,358 134 128,789 West 103,721 3,160 67 106,814 Special revenue: Midwest 152,780 4,956 30 157,706 Northeast 23,892 919 212 24,599 South 144,183 4,281 27 148,437 West 78,935 3,150 44 82,041 Foreign bonds 82,580 2,405 2,457 82,528 Public utilities 213,233 3,701 1,251 215,683 Corporate bonds Energy 116,800 1,032 4,713 113,119 Industrials 227,589 3,329 6,663 224,255 Consumer goods and services 172,529 2,844 776 174,597 Health care 92,132 2,168 791 93,509 Technology, media and telecommunications 142,431 1,972 2,003 142,400 Financial services 259,382 5,246 1,143 263,485 Mortgage-backed securities 16,413 376 51 16,738 Collateralized mortgage obligations Government national mortgage association 120,220 1,391 1,985 119,626 Federal home loan mortgage corporation 137,874 2,377 1,342 138,909 Federal national mortgage association 106,021 2,400 941 107,480 Asset-backed securities 5,461 221 16 5,666 Total Available-for-Sale Fixed Maturities $ 2,793,069 $ 58,994 $ 27,102 $ 2,824,961 Equity securities: Common stocks Public utilities $ 7,231 $ 12,022 $ 193 $ 19,060 Energy 6,103 5,374 266 11,211 Industrials 13,251 31,872 313 44,810 Consumer goods and services 10,301 13,017 3 23,315 Health care 7,763 20,454 — 28,217 Technology, media and telecommunications 5,931 7,538 105 13,364 Financial services 17,392 78,411 109 95,694 Nonredeemable preferred stocks 542 34 — 576 Total Available-for-Sale Equity Securities $ 68,514 $ 168,722 $ 989 $ 236,247 Total Available-for-Sale Securities $ 2,861,583 $ 227,716 $ 28,091 $ 3,061,208
Maturities	The amortized cost and fair value of held-to-maturity, available-for-sale and trading fixed maturity securities at September 30, 2016 , by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset-backed securities, mortgage-backed securities and collateralized mortgage obligations may be subject to prepayment risk and are therefore not categorized by contractual maturity. Held-To-Maturity Available-For-Sale Trading September 30, 2016 Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 150 $ 150 $ 99,301 $ 100,197 $ 2,430 $ 2,919 Due after one year through five years 450 452 820,503 851,672 6,036 6,905 Due after five years through 10 years — — 879,226 926,253 961 1,133 Due after 10 years — — 588,600 609,336 2,160 2,296 Asset-backed securities — — 4,491 4,578 — — Mortgage-backed securities 52 53 18,422 18,879 — — Collateralized mortgage obligations — — 390,531 405,549 — — $ 652 $ 655 $ 2,801,074 $ 2,916,464 $ 11,587 $ 13,253
Net Realized Investment Gains and Losses	A summary of the components of net realized investment gains (losses) is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Net realized investment gains (losses) Fixed maturities: Available-for-sale $ 945 $ 407 $ 2,307 $ 2,363 Trading securities Change in fair value 148 (999 ) 519 (1,461 ) Sales 107 531 568 1,230 Equity securities: Available-for-sale 1,375 1,418 2,359 2,352 Trading securities Change in fair value (5 ) (430 ) 325 (634 ) Sales 20 39 (6 ) 85 Other long-term investments — — — (1,313 ) Cash equivalents — — 169 — Total net realized investment gains $ 2,590 $ 966 $ 6,241 $ 2,622
Proceeds and Gross Realized Gains and Losses	The proceeds and gross realized gains (losses) on the sale of available-for-sale fixed maturity securities are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Proceeds from sales $ 2,007 $ — $ 5,049 $ 8,228 Gross realized gains 11 — 986 1,030
Unrealized Investment Appreciation	A summary of the changes in net unrealized investment appreciation during the reporting period is as follows: Nine Months Ended September 30, 2016 2015 Change in net unrealized investment appreciation Available-for-sale fixed maturities $ 83,498 $ (12,841 ) Available-for-sale equity securities 15,459 (19,119 ) Deferred policy acquisition costs (19,857 ) 2,113 Income tax effect (27,685 ) 10,447 Total change in net unrealized investment appreciation, net of tax $ 51,415 $ (19,400 )
Investments in Unrealized Loss Position	September 30, 2016 Less than 12 months 12 months or longer Total Type of Investment Number Fair Gross Unrealized Number Fair Gross Unrealized Depreciation Fair Gross Unrealized Depreciation AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury 2 $ 1,625 $ 1 — $ — $ — $ 1,625 $ 1 U.S. government agency 1 3,697 3 — — — 3,697 3 States, municipalities and political subdivisions General obligations Midwest 2 9,909 90 — — — 9,909 90 South 7 16,784 314 — — — 16,784 314 West 6 16,353 180 — — — 16,353 180 Special revenue Midwest 3 6,008 56 — — — 6,008 56 Northeast 6 13,978 98 — — — 13,978 98 South 14 $ 37,375 542 — $ — — $ 37,375 542 West 9 19,130 184 — — — 19,130 184 Foreign bonds — — — 3 6,929 894 6,929 894 Public utilities — — — 5 3,097 83 3,097 83 Corporate bonds Energy 3 5,345 40 4 9,209 147 14,554 187 Industrials — — — 5 9,522 668 9,522 668 Technology, media and telecommunications 1 2,198 8 3 10,403 160 12,601 168 Financial services — — — 2 8,036 20 8,036 20 Mortgage-backed securities — — — 4 1,262 8 1,262 8 Collateralized mortgage obligations Government national mortgage association 5 12,340 88 9 14,097 201 26,437 289 Federal home loan mortgage corporation 7 31,530 175 3 5,977 87 37,507 262 Federal national mortgage association 1 5,001 21 4 4,712 110 9,713 131 Asset-backed securities 1 2,571 231 — — — 2,571 231 Total Available-for-Sale Fixed Maturities 68 $ 183,844 $ 2,031 42 $ 73,244 $ 2,378 $ 257,088 $ 4,409 Equity securities: Common stocks Public utilities — $ — $ — 3 $ 109 $ 198 $ 109 $ 198 Energy 1 150 1 2 339 38 489 39 Industrials — — — 6 197 215 197 215 Consumer goods and services 3 299 39 2 14 4 313 43 Technology, media and telecommunications 4 15 1 11 519 36 534 37 Financial services 1 80 1 4 451 64 531 65 Total Available-for-Sale Equity Securities 9 $ 544 $ 42 28 $ 1,629 $ 555 $ 2,173 $ 597 Total Available-for-Sale Securities 77 $ 184,388 $ 2,073 70 $ 74,873 $ 2,933 $ 259,261 $ 5,006 December 31, 2015 Less than 12 months 12 months or longer Total Type of Investment Number Fair Gross Unrealized Depreciation Number Fair Gross Unrealized Depreciation Fair Gross Unrealized Depreciation AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury 6 $ 6,408 $ 26 2 $ 1,634 $ 12 $ 8,042 $ 38 U.S. government agency 38 104,621 1,771 6 18,821 629 123,442 2,400 States, municipalities and political subdivisions General obligations Midwest 4 2,417 12 1 528 6 2,945 18 South 3 4,805 55 8 3,743 79 8,548 134 West 4 8,927 23 2 2,274 44 11,201 67 Special revenue Midwest — — — 1 2,494 30 2,494 30 Northeast 1 4,755 212 — — — 4,755 212 South 4 7,445 26 2 1,851 1 9,296 27 West 4 6,851 44 — — — 6,851 44 Foreign bonds 9 16,991 1,289 2 4,036 1,168 21,027 2,457 Public utilities 35 72,680 880 5 2,840 371 75,520 1,251 Corporate bonds Energy 29 61,496 3,286 4 7,991 1,427 69,487 4,713 Industrials 38 78,588 3,631 3 6,649 3,032 85,237 6,663 Consumer goods and services 24 64,661 770 4 2,491 6 67,152 776 Health care 18 43,992 652 2 3,737 139 47,729 791 Technology, media and telecommunications 22 59,503 1,478 2 8,940 525 68,443 2,003 Financial services 49 92,814 1,143 — — — 92,814 1,143 Mortgage-backed securities 9 7,423 43 4 183 8 7,606 51 Collateralized mortgage obligations Government national mortgage association 17 29,769 437 14 40,027 1,548 69,796 1,985 Federal home loan mortgage corporation 20 35,343 644 6 19,887 698 55,230 1,342 Federal national mortgage association 15 32,800 524 11 11,962 417 44,762 941 Asset-backed securities 1 985 16 — — — 985 16 Total Available-for-Sale Fixed Maturities 350 $ 743,274 $ 16,962 79 $ 140,088 $ 10,140 $ 883,362 $ 27,102 Equity securities: Common stocks Public utilities — $ — $ — 3 $ 115 $ 193 $ 115 $ 193 Energy 10 2,868 266 — — — 2,868 266 Industrials 3 177 44 5 193 269 370 313 Consumer goods and services — — — 2 14 3 14 3 Technology, media and telecommunications 9 438 91 2 12 14 450 105 Financial services 6 326 51 1 136 58 462 109 Total Available-for-Sale Equity Securities 28 $ 3,809 $ 452 13 $ 470 $ 537 $ 4,279 $ 989 Total Available-for-Sale Securities 378 $ 747,083 $ 17,414 92 $ 140,558 $ 10,677 $ 887,641 $ 28,091

Fair Value of Financial Instr21

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Carrying Value and Estimated Fair Value of Financial Instruments	A summary of the carrying value and estimated fair value of our financial instruments at September 30, 2016 and December 31, 2015 is as follows: September 30, 2016 December 31, 2015 Fair Value Carrying Value Fair Value Carrying Value Assets Investments Fixed maturities: Held-to-maturity securities $ 655 $ 652 $ 675 $ 672 Available-for-sale securities 2,916,464 2,916,464 2,824,961 2,824,961 Trading securities 13,253 13,253 12,622 12,622 Equity securities: Available-for-sale securities 251,101 251,101 236,247 236,247 Trading securities 4,645 4,645 4,353 4,353 Mortgage loans 4,063 3,772 4,237 3,961 Policy loans 5,300 5,300 5,618 5,618 Other long-term investments 57,787 57,787 54,151 54,151 Short-term investments 175 175 175 175 Cash and cash equivalents 140,944 140,944 106,449 106,449 Corporate-owned life insurance 2,406 2,406 1,716 1,716 Liabilities Policy reserves Annuity (accumulations) (1) $ 702,251 $ 685,591 $ 707,190 $ 744,931 Annuity (benefit payments) 142,013 95,798 131,899 95,467 (1) Annuity accumulations represent deferred annuity contracts that are currently earning interest.
Financial Instruments Measured at Fair Value on Recurring Basis	The following tables present the categorization for our financial instruments measured at fair value on a recurring basis in our Consolidated Balance Sheets at September 30, 2016 and December 31, 2015 : September 30, 2016 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 22,246 $ — $ 22,246 $ — U.S. government agency 74,607 — 74,607 — States, municipalities and political subdivisions General obligations Midwest 158,362 — 158,362 — Northeast 61,209 — 61,209 — South 136,973 — 136,973 — West 128,296 — 128,296 — Special revenue Midwest 168,111 — 167,857 254 Northeast 55,874 — 55,874 — South 215,604 — 215,604 — West 104,110 — 104,110 — Foreign bonds 73,601 — 73,601 — Public utilities 228,126 — 228,126 — Corporate bonds Energy 113,905 — 113,905 — Industrials 243,612 — 243,612 — Consumer goods and services 188,924 — 187,779 1,145 Health care 87,425 — 87,425 — Technology, media and telecommunications 147,655 — 147,655 — Financial services 278,818 — 269,636 9,182 Mortgage-backed securities 18,879 — 18,879 — Collateralized mortgage obligations Government national mortgage association 135,546 — 135,546 — Federal home loan mortgage corporation 158,743 — 158,743 — Federal national mortgage association 111,260 — 111,260 — Asset-backed securities 4,578 — 3,906 672 Total Available-for-Sale Fixed Maturities $ 2,916,464 $ — $ 2,905,211 $ 11,253 Equity securities: Common stocks Public utilities $ 19,914 $ 19,914 $ — $ — Energy 14,463 14,463 — — Industrials 47,424 47,424 — — Consumer goods and services 25,340 25,340 — — Health care 28,863 28,863 — — Technology, media and telecommunications 15,108 15,108 — — Financial services 99,517 95,525 — 3,992 Nonredeemable preferred stocks 472 472 — — Total Available-for-Sale Equity Securities $ 251,101 $ 247,109 $ — $ 3,992 Total Available-for-Sale Securities $ 3,167,565 $ 247,109 $ 2,905,211 $ 15,245 TRADING Fixed maturities: Corporate bonds Industrials $ 3,833 $ — $ 3,833 $ — Consumer goods and services 538 — 538 — Health care 2,794 — 2,794 — Technology, media and telecommunications 810 — 810 — Financial services 4,155 — 4,155 — Asset-backed securities — — — — Redeemable preferred stocks 1,123 1,123 — — Equity securities: Public utilities 594 594 — — Energy 287 287 — — Industrials 812 812 — — Consumer goods and services 788 788 — — Health care 361 361 — — Financial services 232 232 — — Nonredeemable preferred stocks 1,571 1,571 — — Total Trading Securities $ 17,898 $ 5,768 $ 12,130 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 58,262 $ 58,262 $ — $ — Corporate-Owned Life Insurance $ 2,406 $ — $ 2,406 $ — Total Assets Measured at Fair Value $ 3,246,306 $ 311,314 $ 2,919,747 $ 15,245 December 31, 2015 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 21,649 $ — $ 21,649 $ — U.S. government agency 233,030 — 233,030 — States, municipalities and political subdivisions General obligations Midwest 165,456 — 165,456 — Northeast 58,445 — 58,445 — South 128,789 — 128,789 — West 106,814 — 106,814 — Special revenue Midwest 157,706 — 157,363 343 Northeast 24,599 — 24,599 — South 148,437 — 148,437 — West 82,041 — 82,041 — Foreign bonds 82,528 — 82,528 — Public utilities 215,683 — 215,683 — Corporate bonds Energy 113,119 — 113,119 — Industrials 224,255 — 224,255 — Consumer goods and services 174,597 — 173,364 1,233 Health care 93,509 — 93,509 — Technology, media and telecommunications 142,400 — 142,400 — Financial services 263,485 — 253,823 9,662 Mortgage-backed securities 16,738 — 16,738 — Collateralized mortgage obligations Government national mortgage association 119,626 — 119,626 — Federal home loan mortgage corporation 138,909 — 138,909 — Federal national mortgage association 107,480 — 107,480 — Asset-backed securities 5,666 — 4,630 1,036 Total Available-for-Sale Fixed Maturities $ 2,824,961 $ — $ 2,812,687 $ 12,274 Equity securities: Common stocks Public utilities $ 19,060 $ 19,060 $ — $ — Energy 11,211 11,211 — — Industrials 44,810 44,810 — — Consumer goods and services 23,315 23,315 — — Health care 28,217 28,217 — — Technology, media and telecommunications 13,364 13,364 — — Financial services 95,694 91,588 128 3,978 Nonredeemable preferred stocks 576 576 — — Total Available-for-Sale Equity Securities $ 236,247 $ 232,141 $ 128 $ 3,978 Total Available-for-Sale Securities $ 3,061,208 $ 232,141 $ 2,812,815 $ 16,252 TRADING Fixed maturities: Bonds Corporate bonds Industrials $ 3,558 $ — $ 3,558 $ — Consumer goods and services 118 — 118 — Health care 2,032 — 2,032 — Technology, media and telecommunications 335 — 335 — Financial services 4,094 — 4,094 — Redeemable preferred stocks 2,485 2,485 — — Equity securities: Energy 267 267 — — Industrials 986 986 — — Consumer goods and services 942 942 — — Health care 304 304 — — Financial services 229 229 — — Nonredeemable preferred stocks 1,625 1,625 — — Total Trading Securities $ 16,975 $ 6,838 $ 10,137 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 20,805 $ 20,805 $ — $ — Corporate-Owned Life Insurance $ 1,716 $ — $ 1,716 $ — Total Assets Measured at Fair Value $ 3,100,879 $ 259,959 $ 2,824,668 $ 16,252
Changes in Fair Value of Level 3 Securities	The following table provides a summary of the changes in fair value of our Level 3 securities for the three-month period ended September 30, 2016 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at June 30, 2016 $ 254 $ 10,500 $ 807 $ 3,992 $ 15,553 Net unrealized gains (losses) (1) — 156 22 — 178 Disposals — (329 ) (157 ) — (486 ) Balance at September 30, 2016 $ 254 $ 10,327 $ 672 $ 3,992 $ 15,245 (1) Unrealized gains (losses) are recorded as a component of comprehensive income. The following table provides a summary of the changes in fair value of our Level 3 securities for the nine-month period ended September 30, 2016 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at January 1, 2016 $ 343 $ 10,895 $ 1,036 $ 3,978 $ 16,252 Net unrealized gains (losses) (1) (9 ) 318 91 — 400 Purchases — — — 132 132 Disposals (80 ) (886 ) (455 ) (118 ) (1,539 ) Balance at September 30, 2016 $ 254 $ 10,327 $ 672 $ 3,992 $ 15,245 (1) Unrealized gains (losses) are recorded as a component of comprehensive income.

Employee Benefits (Tables)

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Net Periodic Benefit Cost	The components of the net periodic benefit cost for our pension and postretirement benefit plans are as follows: Pension Plan Postretirement Benefit Plan Three Months Ended September 30, 2016 2015 2016 2015 Net periodic benefit cost Service cost $ 1,623 $ 1,669 $ 932 $ 1,305 Interest cost 1,663 1,500 754 713 Expected return on plan assets (1,988 ) (1,950 ) — — Amortization of net loss 992 1,136 379 731 Net periodic benefit cost $ 2,290 $ 2,355 $ 2,065 $ 2,749 Pension Plan Postretirement Benefit Plan Nine Months Ended September 30, 2016 2015 2016 2015 Net periodic benefit cost Service cost $ 4,869 $ 5,007 $ 2,796 $ 3,915 Interest cost 4,989 4,500 2,262 2,139 Expected return on plan assets (5,964 ) (5,850 ) — — Amortization of net loss 2,976 3,408 1,137 2,193 Net periodic benefit cost $ 6,870 $ 7,065 $ 6,195 $ 8,247

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Share-based Compensation [Abstract]
Activity in Stock Award Plans	The activity in the Stock Plan is displayed in the following table: Authorized Shares Available for Future Award Grants Nine Months Ended September 30, 2016 From Inception to September 30, 2016 Beginning balance 1,394,578 1,900,000 Additional shares authorized — 1,500,000 Number of awards granted (249,528 ) (2,612,456 ) Number of awards forfeited or expired 100,600 458,106 Ending balance 1,245,650 1,245,650 Number of option awards exercised 209,352 859,871 Number of unrestricted stock awards granted 870 7,215 Number of restricted stock awards vested 18,394 36,970 The activity in the Director Plan is displayed in the following table: Authorized Shares Available for Future Award Grants Nine Months Ended September 30, 2016 From Inception to September 30, 2016 Beginning balance 69,938 300,000 Number of awards granted (13,167 ) (249,232 ) Number of awards forfeited or expired 18,000 24,003 Ending balance 74,771 74,771 Number of option awards exercised 31,886 46,693 Number of restricted stock awards vested 11,385 31,556
Remaining Stock-Based Compensation Expense	We expect this compensation to be recognized over the remainder of 2016 and subsequent years according to the following table, except with respect to awards that are accelerated by the Board of Directors, in which case we will recognize any remaining compensation expense in the period in which the awards are accelerated. 2016 $ 865 2017 2,964 2018 2,264 2019 1,194 2020 640 2021 73 Total $ 8,000

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting Information	We have reconciled the amounts in the following table for the three-month periods ended September 30, 2016 and 2015 to the amounts reported in our unaudited Consolidated Financial Statements, adjusting for intersegment eliminations. Property and Casualty Insurance Life Insurance Total As of and for the Three Months Ended September 30, 2016 Net premiums earned $ 239,469 $ 20,600 $ 260,069 Investment income, net of investment expenses 14,065 12,663 26,728 Net realized investment gains 2,129 461 2,590 Other income — 145 145 Total reportable segment $ 255,663 $ 33,869 $ 289,532 Intersegment eliminations (38 ) — (38 ) Total revenues $ 255,625 $ 33,869 $ 289,494 Net income $ 11,628 $ 740 $ 12,368 Assets $ 2,468,258 $ 1,638,779 $ 4,107,037 Invested assets $ 1,735,153 $ 1,517,996 $ 3,253,149 As of and for the Three Months Ended September 30, 2015 Net premiums earned $ 218,993 $ 20,627 $ 239,620 Investment income, net of investment expenses 10,741 13,334 24,075 Net realized investment gains 732 234 966 Other income — 123 123 Total reportable segment $ 230,466 $ 34,318 $ 264,784 Intersegment eliminations (25 ) (199 ) (224 ) Total revenues $ 230,441 $ 34,119 $ 264,560 Net income $ 18,020 $ 1,514 $ 19,534 Assets $ 2,231,851 $ 1,644,165 $ 3,876,016 Invested assets $ 1,572,222 $ 1,524,232 $ 3,096,454 We have reconciled the amounts in the following table for the nine-month periods ended September 30, 2016 and 2015 to the amounts reported in our unaudited Consolidated Financial Statements, adjusting for intersegment eliminations. Property and Casualty Insurance Life Insurance Total As of and for the Nine Months Ended September 30, 2016 Net premiums earned $ 691,976 $ 62,878 $ 754,854 Investment income, net of investment expenses 35,129 38,404 73,533 Net realized investment gains 4,832 1,409 6,241 Other income — 436 436 Total reportable segment $ 731,937 $ 103,127 $ 835,064 Intersegment eliminations (112 ) — (112 ) Total revenues $ 731,825 $ 103,127 $ 834,952 Net income $ 37,083 $ 826 $ 37,909 Assets $ 2,468,258 $ 1,638,779 $ 4,107,037 Invested assets $ 1,735,153 $ 1,517,996 $ 3,253,149 As of and for the Nine Months Ended September 30, 2015 Net premiums earned $ 628,396 $ 54,009 $ 682,405 Investment income, net of investment expenses 33,610 40,623 74,233 Net realized investment gains 316 2,306 2,622 Other income — 318 318 Total reportable segment $ 662,322 $ 97,256 $ 759,578 Intersegment eliminations (28 ) (588 ) (616 ) Total revenues $ 662,294 $ 96,668 $ 758,962 Net income $ 54,420 $ 3,811 $ 58,231 Assets $ 2,231,851 $ 1,644,165 $ 3,876,016 Invested assets $ 1,572,222 $ 1,524,232 $ 3,096,454

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Components of Basic and Diluted Earnings Per Share	The components of basic and diluted earnings per share were as follows for the three-month periods ended September 30, 2016 and 2015 : Three Months Ended September 30, (In Thousands Except Share Data) 2016 2015 Basic Diluted Basic Diluted Net income $ 12,368 $ 12,368 $ 19,534 $ 19,534 Weighted-average common shares outstanding 25,389,633 25,389,633 25,067,080 25,067,080 Add dilutive effect of restricted stock unit awards — 155,270 — 125,135 Add dilutive effect of stock options — 270,443 — 187,133 Weighted-average common shares 25,389,633 25,815,346 25,067,080 25,379,348 Earnings per common share $ 0.49 $ 0.48 $ 0.78 $ 0.77 Awards excluded from diluted earnings per share calculation (1) — — — 260,035 (1) Outstanding awards that are not "in-the-money" are excluded from the diluted earnings per share calculation because the effect of including them would have been anti-dilutive. The components of basic and diluted earnings per share were as follows for the nine-month periods ended September 30, 2016 and 2015 : Nine Months Ended September 30, (In Thousands Except Share Data) 2016 2015 Basic Diluted Basic Diluted Net income $ 37,909 $ 37,909 $ 58,231 $ 58,231 Weighted-average common shares outstanding 25,322,427 25,322,427 25,027,382 25,027,382 Add dilutive effect of restricted stock unit awards — 155,270 — 125,135 Add dilutive effect of stock options — 233,317 — 19,364 Weighted-average common shares 25,322,427 25,711,014 25,027,382 25,171,881 Earnings per common share $ 1.50 $ 1.47 $ 2.33 $ 2.31 Awards excluded from diluted earnings per share calculation (1) — — — 410,425 (1) Outstanding awards that are not "in-the-money" are excluded from the diluted earnings per share calculation because the effect of including them would have been anti-dilutive.

Accumulated Other Comprehensi26

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table shows the changes in the components of our accumulated other comprehensive income (loss), net of tax, for the three-month period ended September 30, 2016 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of June 30, 2016 $ 187,428 $ (46,149 ) $ 141,279 Change in accumulated other comprehensive income before reclassifications (6,136 ) — (6,136 ) Reclassification adjustments from accumulated other comprehensive income (loss) (1,508 ) 891 (617 ) Balance as of September 30, 2016 $ 179,784 $ (45,258 ) $ 134,526 (1) Estimates and Assumptions: The preparation of financial statements in conformity with GAAP requires us to make various estimates and assumptions that affect the reporting of net periodic benefit cost, plan assets and plan obligations for each plan at the date of the financial statements. Actual results could differ from these estimates. One significant estimate relates to the calculation of the benefit obligation for each plan. We annually establish the discount rate, which is an estimate of the interest rate at which these benefits could be effectively settled, that is used to determine the present value of the respective plan's benefit obligations as of December 31. The following table shows the changes in the components of our accumulated other comprehensive income (loss), net of tax, for the nine-month period ended September 30, 2016 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of January 1, 2016 $ 128,369 $ (47,932 ) $ 80,437 Change in accumulated other comprehensive income before reclassifications 54,448 — 54,448 Reclassification adjustments from accumulated other comprehensive income (loss) (3,033 ) 2,674 (359 ) Balance as of September 30, 2016 $ 179,784 $ (45,258 ) $ 134,526 (1) Estimates and Assumptions: The preparation of financial statements in conformity with GAAP requires us to make various estimates and assumptions that affect the reporting of net periodic benefit cost, plan assets and plan obligations for each plan at the date of the financial statements. Actual results could differ from these estimates. One significant estimate relates to the calculation of the benefit obligation for each plan. We annually establish the discount rate, which is an estimate of the interest rate at which these benefits could be effectively settled, that is used to determine the present value of the respective plan's benefit obligations as of December 31.

Nature of Operations and Basi27

Nature of Operations and Basis of Presentation (Narratives) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)state	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)statesegment	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments | segment			2
Segment Reporting Information [Line Items]
Payment for income taxes			$ 24,026,000	$ 31,724,000
Federal tax refund received			0	0
Interest payments			0	0
Decrease in DAC asset related to assumed realization of unrealized gains (losses)	$ 21,860,000		21,860,000		$ 2,003,000
Federal income tax expense	2,807,000	$ 7,290,000	$ 6,904,000	$ 19,957,000
Federal statutory rate			35.00%	35.00%
Liability for unrecognized tax benefits	$ 0		$ 0		$ 0
Property and Casualty Insurance
Segment Reporting Information [Line Items]
Number of states in which we are licensed as insurer | state	46		46
Life Insurance
Segment Reporting Information [Line Items]
Number of states in which we are licensed as insurer | state	37		37

Nature of Operations and Basi28

Nature of Operations and Basis of Presentation (Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	$ 168,264
Underwriting costs deferred	165,763
Amortization of deferred policy acquisition costs	(156,932)
Ending unamortized deferred policy acquisition costs	177,095
Impact of unrealized gains and losses on available-for-sale securities	(19,857)	$ 2,113
Recorded asset at end of period	157,238
Property and Casualty Insurance
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	90,547
Underwriting costs deferred	161,484
Amortization of deferred policy acquisition costs	(151,216)
Ending unamortized deferred policy acquisition costs	100,815
Impact of unrealized gains and losses on available-for-sale securities	0
Recorded asset at end of period	100,815
Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	77,717
Underwriting costs deferred	4,279
Amortization of deferred policy acquisition costs	(5,716)
Ending unamortized deferred policy acquisition costs	76,280
Impact of unrealized gains and losses on available-for-sale securities	(19,857)
Recorded asset at end of period	$ 56,423

Summary of Investments (Fair Va

Summary of Investments (Fair Value of Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
HELD-TO-MATURITY
Cost or Amortized Cost	$ 652	$ 672
Fair Value	655	675
AVAILABLE-FOR-SALE
Cost or Amortized Cost	2,868,983	2,861,583
Gross Unrealized Appreciation	303,588	227,716
Gross Unrealized Depreciation	5,006	28,091
Fair Value	3,167,565	3,061,208
Fixed Maturities
HELD-TO-MATURITY
Cost or Amortized Cost	652	672
Gross Unrealized Appreciation	3	3
Gross Unrealized Depreciation	0	0
Fair Value	655	675
AVAILABLE-FOR-SALE
Cost or Amortized Cost	2,801,074	2,793,069
Gross Unrealized Appreciation	119,799	58,994
Gross Unrealized Depreciation	4,409	27,102
Fair Value	2,916,464	2,824,961
Corporate bonds | Energy
AVAILABLE-FOR-SALE
Cost or Amortized Cost	110,345	116,800
Gross Unrealized Appreciation	3,747	1,032
Gross Unrealized Depreciation	187	4,713
Fair Value	113,905	113,119
Corporate bonds | Industrials
AVAILABLE-FOR-SALE
Cost or Amortized Cost	232,088	227,589
Gross Unrealized Appreciation	12,192	3,329
Gross Unrealized Depreciation	668	6,663
Fair Value	243,612	224,255
Corporate bonds | Consumer goods and services
AVAILABLE-FOR-SALE
Cost or Amortized Cost	179,502	172,529
Gross Unrealized Appreciation	9,422	2,844
Gross Unrealized Depreciation	0	776
Fair Value	188,924	174,597
Corporate bonds | Health care
AVAILABLE-FOR-SALE
Cost or Amortized Cost	82,497	92,132
Gross Unrealized Appreciation	4,928	2,168
Gross Unrealized Depreciation	0	791
Fair Value	87,425	93,509
Corporate bonds | Technology, media and telecommunications
HELD-TO-MATURITY
Cost or Amortized Cost	450	450
Gross Unrealized Appreciation	2	1
Gross Unrealized Depreciation	0	0
Fair Value	452	451
AVAILABLE-FOR-SALE
Cost or Amortized Cost	141,598	142,431
Gross Unrealized Appreciation	6,225	1,972
Gross Unrealized Depreciation	168	2,003
Fair Value	147,655	142,400
Corporate bonds | Financial services
HELD-TO-MATURITY
Cost or Amortized Cost	150	150
Gross Unrealized Appreciation	0	0
Gross Unrealized Depreciation	0	0
Fair Value	150	150
AVAILABLE-FOR-SALE
Cost or Amortized Cost	266,576	259,382
Gross Unrealized Appreciation	12,262	5,246
Gross Unrealized Depreciation	20	1,143
Fair Value	278,818	263,485
Mortgage-backed securities
HELD-TO-MATURITY
Cost or Amortized Cost	52	72
Gross Unrealized Appreciation	1	2
Gross Unrealized Depreciation	0	0
Fair Value	53	74
AVAILABLE-FOR-SALE
Cost or Amortized Cost	18,422	16,413
Gross Unrealized Appreciation	465	376
Gross Unrealized Depreciation	8	51
Fair Value	18,879	16,738
U.S. Treasury
AVAILABLE-FOR-SALE
Cost or Amortized Cost	21,966	21,587
Gross Unrealized Appreciation	281	100
Gross Unrealized Depreciation	1	38
Fair Value	22,246	21,649
U.S. government agency
AVAILABLE-FOR-SALE
Cost or Amortized Cost	71,717	232,808
Gross Unrealized Appreciation	2,893	2,622
Gross Unrealized Depreciation	3	2,400
Fair Value	74,607	233,030
States, municipalities and political subdivisions | General obligations: | Midwest
AVAILABLE-FOR-SALE
Cost or Amortized Cost	153,150	160,484
Gross Unrealized Appreciation	5,302	4,990
Gross Unrealized Depreciation	90	18
Fair Value	158,362	165,456
States, municipalities and political subdivisions | General obligations: | Northeast
AVAILABLE-FOR-SALE
Cost or Amortized Cost	58,373	56,449
Gross Unrealized Appreciation	2,836	1,996
Gross Unrealized Depreciation	0	0
Fair Value	61,209	58,445
States, municipalities and political subdivisions | General obligations: | South
AVAILABLE-FOR-SALE
Cost or Amortized Cost	132,843	125,565
Gross Unrealized Appreciation	4,444	3,358
Gross Unrealized Depreciation	314	134
Fair Value	136,973	128,789
States, municipalities and political subdivisions | General obligations: | West
AVAILABLE-FOR-SALE
Cost or Amortized Cost	123,845	103,721
Gross Unrealized Appreciation	4,631	3,160
Gross Unrealized Depreciation	180	67
Fair Value	128,296	106,814
States, municipalities and political subdivisions | Special revenue: | Midwest
AVAILABLE-FOR-SALE
Cost or Amortized Cost	161,368	152,780
Gross Unrealized Appreciation	6,799	4,956
Gross Unrealized Depreciation	56	30
Fair Value	168,111	157,706
States, municipalities and political subdivisions | Special revenue: | Northeast
AVAILABLE-FOR-SALE
Cost or Amortized Cost	54,109	23,892
Gross Unrealized Appreciation	1,863	919
Gross Unrealized Depreciation	98	212
Fair Value	55,874	24,599
States, municipalities and political subdivisions | Special revenue: | South
AVAILABLE-FOR-SALE
Cost or Amortized Cost	208,747	144,183
Gross Unrealized Appreciation	7,399	4,281
Gross Unrealized Depreciation	542	27
Fair Value	215,604	148,437
States, municipalities and political subdivisions | Special revenue: | West
AVAILABLE-FOR-SALE
Cost or Amortized Cost	100,225	78,935
Gross Unrealized Appreciation	4,069	3,150
Gross Unrealized Depreciation	184	44
Fair Value	104,110	82,041
Foreign bonds
AVAILABLE-FOR-SALE
Cost or Amortized Cost	71,011	82,580
Gross Unrealized Appreciation	3,484	2,405
Gross Unrealized Depreciation	894	2,457
Fair Value	73,601	82,528
Public utilities
AVAILABLE-FOR-SALE
Cost or Amortized Cost	217,670	213,233
Gross Unrealized Appreciation	10,539	3,701
Gross Unrealized Depreciation	83	1,251
Fair Value	228,126	215,683
Government national mortgage association
AVAILABLE-FOR-SALE
Cost or Amortized Cost	131,200	120,220
Gross Unrealized Appreciation	4,635	1,391
Gross Unrealized Depreciation	289	1,985
Fair Value	135,546	119,626
Federal home loan mortgage corporation
AVAILABLE-FOR-SALE
Cost or Amortized Cost	153,379	137,874
Gross Unrealized Appreciation	5,626	2,377
Gross Unrealized Depreciation	262	1,342
Fair Value	158,743	138,909
Federal national mortgage association
AVAILABLE-FOR-SALE
Cost or Amortized Cost	105,952	106,021
Gross Unrealized Appreciation	5,439	2,400
Gross Unrealized Depreciation	131	941
Fair Value	111,260	107,480
Asset-backed securities
AVAILABLE-FOR-SALE
Cost or Amortized Cost	4,491	5,461
Gross Unrealized Appreciation	318	221
Gross Unrealized Depreciation	231	16
Fair Value	4,578	5,666
Equity securities:
AVAILABLE-FOR-SALE
Cost or Amortized Cost	67,909	68,514
Gross Unrealized Appreciation	183,789	168,722
Gross Unrealized Depreciation	597	989
Fair Value	251,101	236,247
Common stocks | Energy
AVAILABLE-FOR-SALE
Cost or Amortized Cost	6,514	6,103
Gross Unrealized Appreciation	7,988	5,374
Gross Unrealized Depreciation	39	266
Fair Value	14,463	11,211
Common stocks | Industrials
AVAILABLE-FOR-SALE
Cost or Amortized Cost	13,252	13,251
Gross Unrealized Appreciation	34,387	31,872
Gross Unrealized Depreciation	215	313
Fair Value	47,424	44,810
Common stocks | Consumer goods and services
AVAILABLE-FOR-SALE
Cost or Amortized Cost	10,324	10,301
Gross Unrealized Appreciation	15,059	13,017
Gross Unrealized Depreciation	43	3
Fair Value	25,340	23,315
Common stocks | Health care
AVAILABLE-FOR-SALE
Cost or Amortized Cost	7,763	7,763
Gross Unrealized Appreciation	21,100	20,454
Gross Unrealized Depreciation	0	0
Fair Value	28,863	28,217
Common stocks | Technology, media and telecommunications
AVAILABLE-FOR-SALE
Cost or Amortized Cost	5,931	5,931
Gross Unrealized Appreciation	9,214	7,538
Gross Unrealized Depreciation	37	105
Fair Value	15,108	13,364
Common stocks | Financial services
AVAILABLE-FOR-SALE
Cost or Amortized Cost	17,288	17,392
Gross Unrealized Appreciation	82,294	78,411
Gross Unrealized Depreciation	65	109
Fair Value	99,517	95,694
Common stocks | Public utilities
AVAILABLE-FOR-SALE
Cost or Amortized Cost	6,394	7,231
Gross Unrealized Appreciation	13,718	12,022
Gross Unrealized Depreciation	198	193
Fair Value	19,914	19,060
Nonredeemable preferred stocks
AVAILABLE-FOR-SALE
Cost or Amortized Cost	443	542
Gross Unrealized Appreciation	29	34
Gross Unrealized Depreciation	0	0
Fair Value	$ 472	$ 576

Summary of Investments (Maturit

Summary of Investments (Maturities) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Held-To-Maturity, Amortized Cost
Due in one year or less	$ 150
Due after one year through five years	450
Due after five years through 10 years	0
Due after 10 years	0
Amortized Cost	652	$ 672
Held-To-Maturity, Fair Value
Due in one year or less	150
Due after one year through five years	452
Due after five years through 10 years	0
Due after 10 years	0
Fair Value	655	675
Available-For-Sale, Amortized Cost
Due in one year or less	99,301
Due after one year through five years	820,503
Due after five years through 10 years	879,226
Due after 10 years	588,600
Amortized Cost	2,868,983	2,861,583
Available-For-Sale, Fair Value
Due in one year or less	100,197
Due after one year through five years	851,672
Due after five years through 10 years	926,253
Due after 10 years	609,336
Fair Value	3,167,565	3,061,208
Trading, Amortized Cost
Due in one year or less	2,430
Due after one year through five years	6,036
Due after five years through 10 years	961
Due after 10 years	2,160
Amortized Cost	11,587	11,475
Trading, Fair Value
Due in one year or less	2,919
Due after one year through five years	6,905
Due after five years through 10 years	1,133
Due after 10 years	2,296
Fair Value	13,253	12,622
Fixed Maturities
Held-To-Maturity, Amortized Cost
Amortized Cost	652	672
Held-To-Maturity, Fair Value
Fair Value	655	675
Available-For-Sale, Amortized Cost
Amortized Cost	2,801,074	2,793,069
Available-For-Sale, Fair Value
Fair Value	2,916,464	2,824,961
Trading, Amortized Cost
Amortized Cost	11,587
Trading, Fair Value
Fair Value	13,253
Asset-backed securities
Held-To-Maturity, Amortized Cost
Securities not categorized by contractual maturity	0
Held-To-Maturity, Fair Value
Securities not categorized by contractual maturity	0
Available-For-Sale, Amortized Cost
Securities not categorized by contractual maturity	4,491
Amortized Cost	4,491	5,461
Available-For-Sale, Fair Value
Securities not categorized by contractual maturity	4,578
Fair Value	4,578	5,666
Mortgage-backed securities
Held-To-Maturity, Amortized Cost
Securities not categorized by contractual maturity	52
Amortized Cost	52	72
Held-To-Maturity, Fair Value
Securities not categorized by contractual maturity	53
Fair Value	53	74
Available-For-Sale, Amortized Cost
Securities not categorized by contractual maturity	18,422
Amortized Cost	18,422	16,413
Available-For-Sale, Fair Value
Securities not categorized by contractual maturity	18,879
Fair Value	18,879	$ 16,738
Collateralized mortgage obligations
Held-To-Maturity, Amortized Cost
Securities not categorized by contractual maturity	0
Held-To-Maturity, Fair Value
Securities not categorized by contractual maturity	0
Available-For-Sale, Amortized Cost
Securities not categorized by contractual maturity	390,531
Available-For-Sale, Fair Value
Securities not categorized by contractual maturity	$ 405,549

Summary of Investments (Net Rea

Summary of Investments (Net Realized Investment Gains and Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	$ 2,590	$ 966	$ 6,241	$ 2,622
Available-for-sale Securities [Abstract]
Proceeds from sales	2,007	0	5,049	8,228
Gross realized gains	11	0	986	1,030
Fixed maturities: | Available-for-sale
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	945	407	2,307	2,363
Fixed maturities: | Change in fair value
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	148	(999)	519	(1,461)
Fixed maturities: | Sales
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	107	531	568	1,230
Equity securities: | Available-for-sale
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	1,375	1,418	2,359	2,352
Equity securities: | Change in fair value
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	(5)	(430)	325	(634)
Equity securities: | Sales
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	20	39	(6)	85
Other long-term investments
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	0	0	0	(1,313)
Cash equivalents
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	$ 0	$ 0	$ 169	$ 0

Summary of Investments (Narrati

Summary of Investments (Narratives) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investments [Abstract]
Trading securities	$ 17,898	$ 16,975
Remaining potential contractual obligation	9,709
Maximum | Equity securities:
Schedule of Investments [Line Items]
Largest unrealized loss greater than 12 months on an individual security	$ 198

Summary of Investments (Unreali

Summary of Investments (Unrealized Appreciation) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$ 83,498	$ (12,841)
Available-for-sale equity securities	15,459	(19,119)
Deferred policy acquisition costs	(19,857)	2,113
Income tax effect	(27,685)	10,447
Total change in net unrealized investment appreciation, net of tax	$ 51,415	$ (19,400)

Summary of Investments (Investm

Summary of Investments (Investments in Unrealized Loss Position) (Details) $ in Thousands	Sep. 30, 2016USD ($)issue	Dec. 31, 2015USD ($)issue
Number of Issues
Less than 12 months | issue	77	378
12 months or longer | issue	70	92
Fair Value
Less than 12 months	$ 184,388	$ 747,083
12 months or longer	74,873	140,558
Total	259,261	887,641
Gross Unrealized Depreciation
Less than 12 months	2,073	17,414
12 months or longer	2,933	10,677
Total	$ 5,006	$ 28,091
Fixed Maturities
Number of Issues
Less than 12 months | issue	68	350
12 months or longer | issue	42	79
Fair Value
Less than 12 months	$ 183,844	$ 743,274
12 months or longer	73,244	140,088
Total	257,088	883,362
Gross Unrealized Depreciation
Less than 12 months	2,031	16,962
12 months or longer	2,378	10,140
Total	$ 4,409	$ 27,102
States, municipalities and political subdivisions | Special revenue: | South
Number of Issues
Less than 12 months | issue	14	4
12 months or longer | issue	0	2
Fair Value
Less than 12 months	$ 37,375	$ 7,445
12 months or longer	0	1,851
Total	37,375	9,296
Gross Unrealized Depreciation
Less than 12 months	542	26
12 months or longer	0	1
Total	$ 542	$ 27
States, municipalities and political subdivisions | Special revenue: | Midwest
Number of Issues
Less than 12 months | issue	3	0
12 months or longer | issue	0	1
Fair Value
Less than 12 months	$ 6,008	$ 0
12 months or longer	0	2,494
Total	6,008	2,494
Gross Unrealized Depreciation
Less than 12 months	56	0
12 months or longer	0	30
Total	$ 56	$ 30
States, municipalities and political subdivisions | Special revenue: | West
Number of Issues
Less than 12 months | issue	9	4
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 19,130	$ 6,851
12 months or longer	0	0
Total	19,130	6,851
Gross Unrealized Depreciation
Less than 12 months	184	44
12 months or longer	0	0
Total	$ 184	$ 44
States, municipalities and political subdivisions | Special revenue: | Northeast
Number of Issues
Less than 12 months | issue	6	1
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 13,978	$ 4,755
12 months or longer	0	0
Total	13,978	4,755
Gross Unrealized Depreciation
Less than 12 months	98	212
12 months or longer	0	0
Total	$ 98	$ 212
States, municipalities and political subdivisions | General obligations: | South
Number of Issues
Less than 12 months | issue	7	3
12 months or longer | issue	0	8
Fair Value
Less than 12 months	$ 16,784	$ 4,805
12 months or longer	0	3,743
Total	16,784	8,548
Gross Unrealized Depreciation
Less than 12 months	314	55
12 months or longer	0	79
Total	$ 314	$ 134
States, municipalities and political subdivisions | General obligations: | Midwest
Number of Issues
Less than 12 months | issue	2	4
12 months or longer | issue	0	1
Fair Value
Less than 12 months	$ 9,909	$ 2,417
12 months or longer	0	528
Total	9,909	2,945
Gross Unrealized Depreciation
Less than 12 months	90	12
12 months or longer	0	6
Total	$ 90	$ 18
States, municipalities and political subdivisions | General obligations: | West
Number of Issues
Less than 12 months | issue	6	4
12 months or longer | issue	0	2
Fair Value
Less than 12 months	$ 16,353	$ 8,927
12 months or longer	0	2,274
Total	16,353	11,201
Gross Unrealized Depreciation
Less than 12 months	180	23
12 months or longer	0	44
Total	$ 180	$ 67
Foreign bonds
Number of Issues
Less than 12 months | issue	0	9
12 months or longer | issue	3	2
Fair Value
Less than 12 months	$ 0	$ 16,991
12 months or longer	6,929	4,036
Total	6,929	21,027
Gross Unrealized Depreciation
Less than 12 months	0	1,289
12 months or longer	894	1,168
Total	$ 894	$ 2,457
Public utilities
Number of Issues
Less than 12 months | issue	0	35
12 months or longer | issue	5	5
Fair Value
Less than 12 months	$ 0	$ 72,680
12 months or longer	3,097	2,840
Total	3,097	75,520
Gross Unrealized Depreciation
Less than 12 months	0	880
12 months or longer	83	371
Total	$ 83	$ 1,251
Corporate bonds | Energy
Number of Issues
Less than 12 months | issue	3	29
12 months or longer | issue	4	4
Fair Value
Less than 12 months	$ 5,345	$ 61,496
12 months or longer	9,209	7,991
Total	14,554	69,487
Gross Unrealized Depreciation
Less than 12 months	40	3,286
12 months or longer	147	1,427
Total	$ 187	$ 4,713
Corporate bonds | Industrials
Number of Issues
Less than 12 months | issue	0	38
12 months or longer | issue	5	3
Fair Value
Less than 12 months	$ 0	$ 78,588
12 months or longer	9,522	6,649
Total	9,522	85,237
Gross Unrealized Depreciation
Less than 12 months	0	3,631
12 months or longer	668	3,032
Total	$ 668	$ 6,663
Corporate bonds | Consumer goods and services
Number of Issues
Less than 12 months | issue		24
12 months or longer | issue		4
Fair Value
Less than 12 months		$ 64,661
12 months or longer		2,491
Total		67,152
Gross Unrealized Depreciation
Less than 12 months		770
12 months or longer		6
Total		$ 776
Corporate bonds | Technology, media and telecommunications
Number of Issues
Less than 12 months | issue	1	22
12 months or longer | issue	3	2
Fair Value
Less than 12 months	$ 2,198	$ 59,503
12 months or longer	10,403	8,940
Total	12,601	68,443
Gross Unrealized Depreciation
Less than 12 months	8	1,478
12 months or longer	160	525
Total	$ 168	$ 2,003
Corporate bonds | Financial services
Number of Issues
Less than 12 months | issue	0	49
12 months or longer | issue	2	0
Fair Value
Less than 12 months	$ 0	$ 92,814
12 months or longer	8,036	0
Total	8,036	92,814
Gross Unrealized Depreciation
Less than 12 months	0	1,143
12 months or longer	20	0
Total	$ 20	$ 1,143
Corporate bonds | Health care
Number of Issues
Less than 12 months | issue		18
12 months or longer | issue		2
Fair Value
Less than 12 months		$ 43,992
12 months or longer		3,737
Total		47,729
Gross Unrealized Depreciation
Less than 12 months		652
12 months or longer		139
Total		$ 791
Mortgage-backed securities
Number of Issues
Less than 12 months | issue	0	9
12 months or longer | issue	4	4
Fair Value
Less than 12 months	$ 0	$ 7,423
12 months or longer	1,262	183
Total	1,262	7,606
Gross Unrealized Depreciation
Less than 12 months	0	43
12 months or longer	8	8
Total	$ 8	$ 51
Government national mortgage association
Number of Issues
Less than 12 months | issue	5	17
12 months or longer | issue	9	14
Fair Value
Less than 12 months	$ 12,340	$ 29,769
12 months or longer	14,097	40,027
Total	26,437	69,796
Gross Unrealized Depreciation
Less than 12 months	88	437
12 months or longer	201	1,548
Total	$ 289	$ 1,985
Federal home loan mortgage corporation
Number of Issues
Less than 12 months | issue	7	20
12 months or longer | issue	3	6
Fair Value
Less than 12 months	$ 31,530	$ 35,343
12 months or longer	5,977	19,887
Total	37,507	55,230
Gross Unrealized Depreciation
Less than 12 months	175	644
12 months or longer	87	698
Total	$ 262	$ 1,342
Federal national mortgage association
Number of Issues
Less than 12 months | issue	1	15
12 months or longer | issue	4	11
Fair Value
Less than 12 months	$ 5,001	$ 32,800
12 months or longer	4,712	11,962
Total	9,713	44,762
Gross Unrealized Depreciation
Less than 12 months	21	524
12 months or longer	110	417
Total	$ 131	$ 941
Asset-backed Securities [Member]
Number of Issues
Less than 12 months | issue	1	1
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 2,571	$ 985
12 months or longer	0	0
Total	2,571	985
Gross Unrealized Depreciation
Less than 12 months	231	16
12 months or longer	0	0
Total	$ 231	$ 16
Common stocks | Energy
Number of Issues
Less than 12 months | issue	1	10
12 months or longer | issue	2	0
Fair Value
Less than 12 months	$ 150	$ 2,868
12 months or longer	339	0
Total	489	2,868
Gross Unrealized Depreciation
Less than 12 months	1	266
12 months or longer	38	0
Total	$ 39	$ 266
Common stocks | Industrials
Number of Issues
Less than 12 months | issue	0	3
12 months or longer | issue	6	5
Fair Value
Less than 12 months	$ 0	$ 177
12 months or longer	197	193
Total	197	370
Gross Unrealized Depreciation
Less than 12 months	0	44
12 months or longer	215	269
Total	$ 215	$ 313
Common stocks | Consumer goods and services
Number of Issues
Less than 12 months | issue	3	0
12 months or longer | issue	2	2
Fair Value
Less than 12 months	$ 299	$ 0
12 months or longer	14	14
Total	313	14
Gross Unrealized Depreciation
Less than 12 months	39	0
12 months or longer	4	3
Total	$ 43	$ 3
Common stocks | Technology, media and telecommunications
Number of Issues
Less than 12 months | issue	4	9
12 months or longer | issue	11	2
Fair Value
Less than 12 months	$ 15	$ 438
12 months or longer	519	12
Total	534	450
Gross Unrealized Depreciation
Less than 12 months	1	91
12 months or longer	36	14
Total	$ 37	$ 105
Common stocks | Financial services
Number of Issues
Less than 12 months | issue	1	6
12 months or longer | issue	4	1
Fair Value
Less than 12 months	$ 80	$ 326
12 months or longer	451	136
Total	531	462
Gross Unrealized Depreciation
Less than 12 months	1	51
12 months or longer	64	58
Total	$ 65	$ 109
Common stocks | Public utilities
Number of Issues
Less than 12 months | issue	0	0
12 months or longer | issue	3	3
Fair Value
Less than 12 months	$ 0	$ 0
12 months or longer	109	115
Total	109	115
Gross Unrealized Depreciation
Less than 12 months	0	0
12 months or longer	198	193
Total	$ 198	$ 193
Equity securities:
Number of Issues
Less than 12 months | issue	9	28
12 months or longer | issue	28	13
Fair Value
Less than 12 months	$ 544	$ 3,809
12 months or longer	1,629	470
Total	2,173	4,279
Gross Unrealized Depreciation
Less than 12 months	42	452
12 months or longer	555	537
Total	$ 597	$ 989
U.S. Treasury
Number of Issues
Less than 12 months | issue	2	6
12 months or longer | issue	0	2
Fair Value
Less than 12 months	$ 1,625	$ 6,408
12 months or longer	0	1,634
Total	1,625	8,042
Gross Unrealized Depreciation
Less than 12 months	1	26
12 months or longer	0	12
Total	$ 1	$ 38
U.S. government agency
Number of Issues
Less than 12 months | issue	1	38
12 months or longer | issue	0	6
Fair Value
Less than 12 months	$ 3,697	$ 104,621
12 months or longer	0	18,821
Total	3,697	123,442
Gross Unrealized Depreciation
Less than 12 months	3	1,771
12 months or longer	0	629
Total	$ 3	$ 2,400

Fair Value of Financial Instr35

Fair Value of Financial Instruments (Corporate-Owned Life Insurance) (Details)	Sep. 30, 2016USD ($)
Rabbi Trust | Other Assets | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash surrender value	$ 2,406

Fair Value of Financial Instr36

Fair Value of Financial Instruments (Carrying Value and Estimated Fair Value) (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Investments
Held-to-maturity securities		$ 655	$ 675
Available-for-sale securities		3,167,565	3,061,208
Trading securities		17,898	16,975
Fair Value
Investments
Mortgage loans		4,063	4,237
Policy loans		5,300	5,618
Other long-term investments		57,787	54,151
Short-term investments		175	175
Cash and cash equivalents		140,944	106,449
Corporate-owned life insurance		2,406	1,716
Policy reserves
Annuity (accumulations)	[1]	702,251	707,190
Annuity (benefit payments)		142,013	131,899
Fair Value | Fixed maturities:
Investments
Held-to-maturity securities		655	675
Available-for-sale securities		2,916,464	2,824,961
Trading securities		13,253	12,622
Fair Value | Equity securities:
Investments
Available-for-sale securities		251,101	236,247
Trading securities		4,645	4,353
Carrying Value
Investments
Mortgage loans		3,772	3,961
Policy loans		5,300	5,618
Other long-term investments		57,787	54,151
Short-term investments		175	175
Cash and cash equivalents		140,944	106,449
Corporate-owned life insurance		2,406	1,716
Policy reserves
Annuity (accumulations)	[1]	685,591	744,931
Annuity (benefit payments)		95,798	95,467
Carrying Value | Fixed maturities:
Investments
Held-to-maturity securities		652	672
Available-for-sale securities		2,916,464	2,824,961
Trading securities		13,253	12,622
Carrying Value | Equity securities:
Investments
Available-for-sale securities		251,101	236,247
Trading securities		$ 4,645	$ 4,353
[1]	Annuity accumulations represent deferred annuity contracts that are currently earning interest.

Fair Value of Financial Instr37

Fair Value of Financial Instruments (Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	$ 3,167,565	$ 3,061,208
Trading Securities	17,898	16,975
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	22,246	21,649
U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	74,607	233,030
States, municipalities and political subdivisions | General obligations: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	158,362	165,456
States, municipalities and political subdivisions | General obligations: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	61,209	58,445
States, municipalities and political subdivisions | General obligations: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	136,973	128,789
States, municipalities and political subdivisions | General obligations: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	128,296	106,814
States, municipalities and political subdivisions | Special revenue: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	168,111	157,706
States, municipalities and political subdivisions | Special revenue: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	55,874	24,599
States, municipalities and political subdivisions | Special revenue: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	215,604	148,437
States, municipalities and political subdivisions | Special revenue: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	104,110	82,041
Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	73,601	82,528
Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	228,126	215,683
Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	113,905	113,119
Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	243,612	224,255
Corporate bonds | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	188,924	174,597
Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	87,425	93,509
Corporate bonds | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	147,655	142,400
Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	278,818	263,485
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	18,879	16,738
Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	135,546	119,626
Federal home loan mortgage corporation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	158,743	138,909
Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	111,260	107,480
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	4,578	5,666
Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	2,916,464	2,824,961
Common stocks | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	14,463	11,211
Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	47,424	44,810
Common stocks | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	25,340	23,315
Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	28,863	28,217
Common stocks | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	15,108	13,364
Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	99,517	95,694
Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	19,914	19,060
Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	472	576
Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	251,101	236,247
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	3,167,565	3,061,208
Trading Securities	17,898	16,975
Short-Term Investments	175	175
Money Market Accounts	58,262	20,805
Corporate-Owned Life Insurance	2,406	1,716
Total Assets Measured at Fair Value	3,246,306	3,100,879
Recurring | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	22,246	21,649
Recurring | U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	74,607	233,030
Recurring | States, municipalities and political subdivisions | General obligations: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	158,362	165,456
Recurring | States, municipalities and political subdivisions | General obligations: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	61,209	58,445
Recurring | States, municipalities and political subdivisions | General obligations: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	136,973	128,789
Recurring | States, municipalities and political subdivisions | General obligations: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	128,296	106,814
Recurring | States, municipalities and political subdivisions | Special revenue: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	168,111	157,706
Recurring | States, municipalities and political subdivisions | Special revenue: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	55,874	24,599
Recurring | States, municipalities and political subdivisions | Special revenue: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	215,604	148,437
Recurring | States, municipalities and political subdivisions | Special revenue: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	104,110	82,041
Recurring | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	73,601	82,528
Recurring | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	228,126	215,683
Recurring | Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	113,905	113,119
Recurring | Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	243,612	224,255
Trading Securities	3,833	3,558
Recurring | Corporate bonds | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	188,924	174,597
Trading Securities	538	118
Recurring | Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	87,425	93,509
Trading Securities	2,794	2,032
Recurring | Corporate bonds | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	147,655	142,400
Trading Securities	810	335
Recurring | Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	278,818	263,485
Trading Securities	4,155	4,094
Recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	18,879	16,738
Recurring | Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	135,546	119,626
Recurring | Federal home loan mortgage corporation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	158,743	138,909
Recurring | Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	111,260	107,480
Recurring | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	4,578	5,666
Trading Securities	0
Recurring | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	2,916,464	2,824,961
Recurring | Common stocks | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	14,463	11,211
Recurring | Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	47,424	44,810
Recurring | Common stocks | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	25,340	23,315
Recurring | Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	28,863	28,217
Recurring | Common stocks | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	15,108	13,364
Recurring | Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	99,517	95,694
Recurring | Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	19,914	19,060
Recurring | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	472	576
Trading Securities	1,571	1,625
Recurring | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	251,101	236,247
Recurring | Equity securities: | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	287	267
Recurring | Equity securities: | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	812	986
Recurring | Equity securities: | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	788	942
Recurring | Equity securities: | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	361	304
Recurring | Equity securities: | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	232	229
Recurring | Equity securities: | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	594
Recurring | Redeemable Preferred Stocks [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	1,123	2,485
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	247,109	232,141
Trading Securities	5,768	6,838
Short-Term Investments	175	175
Money Market Accounts	58,262	20,805
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	311,314	259,959
Recurring | Level 1 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 1 | Corporate bonds | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 1 | Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 1 | Corporate bonds | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 1 | Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 1 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Federal home loan mortgage corporation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0
Recurring | Level 1 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 1 | Common stocks | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	14,463	11,211
Recurring | Level 1 | Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	47,424	44,810
Recurring | Level 1 | Common stocks | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	25,340	23,315
Recurring | Level 1 | Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	28,863	28,217
Recurring | Level 1 | Common stocks | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	15,108	13,364
Recurring | Level 1 | Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	95,525	91,588
Recurring | Level 1 | Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	19,914	19,060
Recurring | Level 1 | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	472	576
Trading Securities	1,571	1,625
Recurring | Level 1 | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	247,109	232,141
Recurring | Level 1 | Equity securities: | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	287	267
Recurring | Level 1 | Equity securities: | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	812	986
Recurring | Level 1 | Equity securities: | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	788	942
Recurring | Level 1 | Equity securities: | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	361	304
Recurring | Level 1 | Equity securities: | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	232	229
Recurring | Level 1 | Equity securities: | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	594
Recurring | Level 1 | Redeemable Preferred Stocks [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	1,123	2,485
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	2,905,211	2,812,815
Trading Securities	12,130	10,137
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	2,406	1,716
Total Assets Measured at Fair Value	2,919,747	2,824,668
Recurring | Level 2 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	22,246	21,649
Recurring | Level 2 | U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	74,607	233,030
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	158,362	165,456
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	61,209	58,445
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	136,973	128,789
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	128,296	106,814
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	167,857	157,363
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	55,874	24,599
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	215,604	148,437
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	104,110	82,041
Recurring | Level 2 | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	73,601	82,528
Recurring | Level 2 | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	228,126	215,683
Recurring | Level 2 | Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	113,905	113,119
Recurring | Level 2 | Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	243,612	224,255
Trading Securities	3,833	3,558
Recurring | Level 2 | Corporate bonds | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	187,779	173,364
Trading Securities	538	118
Recurring | Level 2 | Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	87,425	93,509
Trading Securities	2,794	2,032
Recurring | Level 2 | Corporate bonds | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	147,655	142,400
Trading Securities	810	335
Recurring | Level 2 | Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	269,636	253,823
Trading Securities	4,155	4,094
Recurring | Level 2 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	18,879	16,738
Recurring | Level 2 | Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	135,546	119,626
Recurring | Level 2 | Federal home loan mortgage corporation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	158,743	138,909
Recurring | Level 2 | Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	111,260	107,480
Recurring | Level 2 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	3,906	4,630
Trading Securities	0
Recurring | Level 2 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	2,905,211	2,812,687
Recurring | Level 2 | Common stocks | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 2 | Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 2 | Common stocks | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 2 | Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 2 | Common stocks | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 2 | Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	128
Recurring | Level 2 | Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 2 | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 2 | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	128
Recurring | Level 2 | Equity securities: | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 2 | Equity securities: | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 2 | Equity securities: | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 2 | Equity securities: | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 2 | Equity securities: | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 2 | Equity securities: | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0
Recurring | Level 2 | Redeemable Preferred Stocks [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	15,245	16,252
Trading Securities	0	0
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	15,245	16,252
Recurring | Level 3 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | Midwest
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	254	343
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | Northeast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | South
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | West
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 3 | Corporate bonds | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	1,145	1,233
Trading Securities	0	0
Recurring | Level 3 | Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 3 | Corporate bonds | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 3 | Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	9,182	9,662
Trading Securities	0	0
Recurring | Level 3 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Federal home loan mortgage corporation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	672	1,036
Trading Securities	0
Recurring | Level 3 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	11,253	12,274
Recurring | Level 3 | Common stocks | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Common stocks | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Common stocks | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	3,992	3,978
Recurring | Level 3 | Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Recurring | Level 3 | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	0	0
Trading Securities	0	0
Recurring | Level 3 | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities	3,992	3,978
Recurring | Level 3 | Equity securities: | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 3 | Equity securities: | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 3 | Equity securities: | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 3 | Equity securities: | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 3 | Equity securities: | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0	0
Recurring | Level 3 | Equity securities: | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0
Recurring | Level 3 | Redeemable Preferred Stocks [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	$ 0	$ 0

Fair Value of Financial Instr38

Fair Value of Financial Instruments (Level 3 Securities) (Details) - Recurring - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2016	Sep. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		$ 15,553	$ 16,252
Net unrealized gains (losses)	[1]	178	400
Disposals		(486)	(1,539)
Purchases			132
Ending Balance		15,245	15,245
States, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		254	343
Net unrealized gains (losses)	[1]	0	(9)
Disposals		0	(80)
Purchases			0
Ending Balance		254	254
Corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		10,500	10,895
Net unrealized gains (losses)	[1]	156	318
Disposals		(329)	(886)
Purchases			0
Ending Balance		10,327	10,327
Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		807	1,036
Net unrealized gains (losses)	[1]	22	91
Disposals		(157)	(455)
Purchases			0
Ending Balance		672	672
Equities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		3,992	3,978
Net unrealized gains (losses)	[1]	0	0
Disposals		0	(118)
Purchases			132
Ending Balance		$ 3,992	$ 3,992
[1]	Unrealized gains (losses) are recorded as a component of comprehensive income.

Employee Benefits (Details)

Employee Benefits (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Pension Plan
Net periodic benefit cost
Service cost		$ 1,623	$ 1,669	$ 4,869	$ 5,007
Interest cost		1,663	1,500	4,989	4,500
Expected return on plan assets		(1,988)	(1,950)	(5,964)	(5,850)
Amortization of net loss		992	1,136	2,976	3,408
Net periodic benefit cost		2,290	2,355	6,870	7,065
Estimated 2016 pension plan contribution, disclosed in prior year 10K						$ 6,384
Contribution by employer	$ 10			16,383
Postretirement Benefit Plan
Net periodic benefit cost
Service cost		932	1,305	2,796	3,915
Interest cost		754	713	2,262	2,139
Expected return on plan assets		0	0	0	0
Amortization of net loss		379	731	1,137	2,193
Net periodic benefit cost		$ 2,065	$ 2,749	$ 6,195	$ 8,247

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		93 Months Ended
	May 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015	Dec. 31, 2008	Dec. 31, 2004
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 865	$ 616	$ 2,731	$ 1,817
Stock-based compensation expense to be recognized through results of operations		$ 8,000		$ 8,000		$ 8,000
Employee Stock Award Plan-2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (in shares)		1,245,650		1,245,650		1,245,650	1,394,578	1,900,000
Additional shares authorized (in shares)	1,500,000			0		1,500,000
Percentage of option awards vest and exercisable in installments				20.00%
Employee Stock Award Plan-2008 | Options Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period				10 years
Employee Stock Award Plan-2008 | Restricted Stock Awards | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				3 years
Employee Stock Award Plan-2008 | Restricted Stock Awards | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				5 years
Director Plan - 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (in shares)		74,771		74,771		74,771	69,938		300,000

Stock-Based Compensation (Activ

Stock-Based Compensation (Activity in the Stock Plan) (Details) - shares	1 Months Ended	9 Months Ended	90 Months Ended	93 Months Ended	138 Months Ended	141 Months Ended
	May 31, 2014	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2016
Employee Stock Award Plan-2008
Authorized Shares Available for Future Award Grants
Beginning balance (in shares)		1,394,578	1,900,000	1,900,000
Additional shares authorized (in shares)	1,500,000	0		1,500,000
Number of awards granted (in shares)		(249,528)	(2,612,456)
Number of awards forfeited or expired (in shares)		100,600	458,106
Ending balance (in shares)		1,245,650		1,245,650		1,245,650
Employee Stock Award Plan-2008 | Options Awards
Authorized Shares Available for Future Award Grants
Number of option awards exercised (in shares)		209,352	859,871
Employee Stock Award Plan-2008 | Unrestricted Stock Awards
Authorized Shares Available for Future Award Grants
Number of awards granted (in shares)		(870)	(7,215)
Employee Stock Award Plan-2008 | Restricted Stock Awards
Authorized Shares Available for Future Award Grants
Number of restricted stock awards vested (in shares)		18,394	36,970
Director Plan - 2005
Authorized Shares Available for Future Award Grants
Beginning balance (in shares)		69,938			300,000	300,000
Number of awards granted (in shares)		(13,167)				(249,232)
Number of awards forfeited or expired (in shares)		18,000			24,003
Ending balance (in shares)		74,771		74,771		74,771
Director Plan - 2005 | Options Awards
Authorized Shares Available for Future Award Grants
Number of option awards exercised (in shares)		31,886			46,693
Number of restricted stock awards vested (in shares)		11,385			31,556

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock-based Compensation Expense) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Share-based Compensation [Abstract]
2,016	$ 865
2,017	2,964
2,018	2,264
2,019	1,194
2,020	640
2,021	73
Total	$ 8,000

Segment Information (Details)

Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)location	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)segmentlocation	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Segment Reporting Information [Line Items]
Number of business segments | segment			2
Net premiums earned	$ 260,069	$ 239,421	$ 754,854	$ 681,817
Investment income, net of investment expenses	26,690	24,050	73,421	74,205
Net realized investment gains	2,590	966	6,241	2,622
Other income	145	123	436	318
Total revenues	289,494	264,560	834,952	758,962
Net income	12,368	19,534	37,909	58,231
Assets	4,107,037	3,876,016	4,107,037	3,876,016	$ 3,890,376
Invested assets	$ 3,253,149	3,096,454	$ 3,253,149	3,096,454	$ 3,142,760
Property and Casualty Insurance
Segment Reporting Information [Line Items]
Number of domestic locations | location	7		7
Total revenues	$ 255,625	230,441	$ 731,825	662,294
Net income	11,628	18,020	37,083	54,420
Assets	2,468,258	2,231,851	2,468,258	2,231,851
Invested assets	1,735,153	1,572,222	1,735,153	1,572,222
Life Insurance
Segment Reporting Information [Line Items]
Total revenues	33,869	34,119	103,127	96,668
Net income	740	1,514	826	3,811
Assets	1,638,779	1,644,165	1,638,779	1,644,165
Invested assets	1,517,996	1,524,232	1,517,996	1,524,232
Operating Segments
Segment Reporting Information [Line Items]
Net premiums earned	260,069	239,620	754,854	682,405
Investment income, net of investment expenses	26,728	24,075	73,533	74,233
Net realized investment gains	2,590	966	6,241	2,622
Other income	145	123	436	318
Total revenues	289,532	264,784	835,064	759,578
Operating Segments | Property and Casualty Insurance
Segment Reporting Information [Line Items]
Net premiums earned	239,469	218,993	691,976	628,396
Investment income, net of investment expenses	14,065	10,741	35,129	33,610
Net realized investment gains	2,129	732	4,832	316
Other income	0	0	0	0
Total revenues	255,663	230,466	731,937	662,322
Operating Segments | Life Insurance
Segment Reporting Information [Line Items]
Net premiums earned	20,600	20,627	62,878	54,009
Investment income, net of investment expenses	12,663	13,334	38,404	40,623
Net realized investment gains	461	234	1,409	2,306
Other income	145	123	436	318
Total revenues	33,869	34,318	103,127	97,256
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	(38)	(224)	(112)	(616)
Intersegment Eliminations | Property and Casualty Insurance
Segment Reporting Information [Line Items]
Total revenues	(38)	(25)	(112)	(28)
Intersegment Eliminations | Life Insurance
Segment Reporting Information [Line Items]
Total revenues	$ 0	$ (199)	$ 0	$ (588)

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Basic and Diluted Earnings per Share [Line Items]
Net income		$ 12,368	$ 19,534	$ 37,909	$ 58,231
Weighted-average common shares outstanding (in shares)		25,389,633	25,067,080	25,322,427	25,027,382
Weighted-average common shares for EPS calculation (in shares)		25,815,346	25,379,348	25,711,014	25,171,881
Basic earnings per common share (in dollars per share)		$ 0.49	$ 0.78	$ 1.50	$ 2.33
Diluted earnings per common share (in dollars per share)		$ 0.48	$ 0.77	$ 1.47	$ 2.31
Awards excluded from diluted earnings per share calculation (in shares)	[1]	0	260,035	0	410,425
Restricted Stock Unit Awards
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)		155,270	125,135	155,270	125,135
Stock Options
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)		270,443	187,133	233,317	19,364
[1]	Outstanding awards that are not "in-the-money" are excluded from the diluted earnings per share calculation because the effect of including them would have been anti-dilutive.

Credit Facility (Details)

Credit Facility (Details)	Feb. 02, 2016USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Dec. 22, 2015USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000,000
Debt covenant, maximum debt to total capitalization ratio	0.35
Outstanding balance on credit facility		$ 0	$ 0
Interest expense incurred		$ 0	$ 0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 50,000,000
Credit agreement term	4 years
Current borrowing capacity				$ 100,000,000
Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 20,000,000			20,000,000
Swing Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 5,000,000			$ 5,000,000

Accumulated Other Comprehensi46

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year				$ 878,897
Change in accumulated other comprehensive income before reclassifications		$ (6,136)	$ (1,305)	54,448		$ (16,336)
Reclassification adjustments from accumulated other comprehensive income (loss)		(617)	$ 27	(359)		$ 576
Balance, end of period		959,180		959,180
Net unrealized appreciation on investments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year		187,428		128,369
Change in accumulated other comprehensive income before reclassifications		(6,136)		54,448
Reclassification adjustments from accumulated other comprehensive income (loss)		(1,508)		(3,033)
Balance, end of period		179,784		179,784
Liability for underfunded employee benefit costs
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year		(46,149)		(47,932)	[1]
Change in accumulated other comprehensive income before reclassifications	[1]	0		0
Reclassification adjustments from accumulated other comprehensive income (loss)	[1]	891		2,674
Balance, end of period	[1]	(45,258)		(45,258)
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year		141,279		80,437
Change in accumulated other comprehensive income before reclassifications		(6,136)		54,448
Reclassification adjustments from accumulated other comprehensive income (loss)		(617)		(359)
Balance, end of period		$ 134,526		$ 134,526
[1]	Estimates and Assumptions: The preparation of financial statements in conformity with GAAP requires us to make various estimates and assumptions that affect the reporting of net periodic benefit cost, plan assets and plan obligations for each plan at the date of the financial statements. Actual results could differ from these estimates. One significant estimate relates to the calculation of the benefit obligation for each plan. We annually establish the discount rate, which is an estimate of the interest rate at which these benefits could be effectively settled, that is used to determine the present value of the respective plan's benefit obligations as of December 31.