United Fire (UFCS) 10-Q 2 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 31, 2017
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
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)		25,028,746

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fixed maturities
Held-to-maturity, at amortized cost (fair value $192 in 2017 and $199 in 2016)	$ 192	$ 198
Available-for-sale, at fair value (amortized cost $2,912,326 in 2017 and $2,887,505 in 2016)	2,955,079	2,898,126
Trading securities, at fair value (amortized cost $13,945 in 2017 and $13,054 in 2016)	15,828	14,390
Equity securities
Available-for-sale, at fair value (cost $62,533 in 2017 and $68,504 in 2016)	276,306	270,416
Trading securities, at fair value (cost $6,046 in 2017 and $5,434 in 2016)	6,612	5,644
Mortgage loans	3,573	3,706
Policy loans	5,499	5,366
Other long-term investments	65,664	67,639
Short-term investments	175	175
Total investments	3,328,928	3,265,660
Cash and cash equivalents	130,421	110,853
Accrued investment income	25,530	25,056
Premiums receivable (net of allowance for doubtful accounts of $1,178 in 2017 and $1,255 in 2016)	361,866	306,202
Deferred policy acquisition costs	167,512	164,112
Property and equipment (primarily land and buildings, at cost, less accumulated depreciation of $51,144 in 2017 and $50,925 in 2016)	57,726	55,524
Reinsurance receivables and recoverables	73,967	69,413
Prepaid reinsurance premiums	3,966	3,782
Income taxes receivable	8,288	15,061
Goodwill and intangible assets	24,355	24,740
Other assets	14,853	14,355
TOTAL ASSETS	4,197,412	4,054,758
Future policy benefits and losses, claims and loss settlement expenses
Property and casualty insurance	1,180,478	1,123,896
Life insurance	1,329,855	1,350,503
Unearned premiums	502,415	443,873
Accrued expenses and other liabilities	173,610	159,014
Deferred income taxes	48,466	35,588
TOTAL LIABILITIES	3,234,824	3,112,874
Stockholders’ Equity
Common stock, $0.001 par value; authorized 75,000,000 shares; 25,028,037 and 25,429,769 shares issued and outstanding in 2017 and 2016, respectively	25	25
Additional paid-in capital	199,759	216,482
Retained earnings	625,836	616,322
Accumulated other comprehensive income, net of tax	136,968	109,055
TOTAL STOCKHOLDERS’ EQUITY	962,588	941,884
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 4,197,412	$ 4,054,758

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Fixed maturities, held-to-maturity securities, fair value	$ 192	$ 199
Fixed maturities, available-for-sale securities, amortized cost	2,912,326	2,887,505
Fixed maturities, trading securities, amortized cost	13,945	13,054
Equity securities, available-for-sale securities, amortized cost	62,533	68,504
Equity securities, trading securities, amortized cost	6,046	5,434
Allowance for doubtful accounts	1,178	1,255
Property and equipment accumulated depreciation	$ 51,144	$ 50,925
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)	25,028,037	25,429,769
Common stock, shares outstanding (in shares)	25,028,037	25,429,769

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Net premiums earned	$ 259,563	$ 253,487	$ 513,435	$ 494,785
Investment income, net of investment expenses	24,610	24,507	49,645	46,731
Net realized investment gains (includes reclassifications for net unrealized investment gains on available-for-sale securities of $1,975 and $5,380 in 2017 and $700 and $2,346 in 2016; previously included in accumulated other comprehensive income)	2,680	1,596	6,634	3,651
Other income	126	183	324	291
Total revenues	286,979	279,773	570,038	545,458
Benefits, Losses and Expenses
Losses and loss settlement expenses	197,698	180,412	365,321	322,540
Increase in liability for future policy benefits	5,281	16,002	13,860	28,554
Amortization of deferred policy acquisition costs	53,093	52,585	105,227	102,816
Other underwriting expenses (includes reclassifications for employee benefit costs of $1,352 and $2,704 in 2017 and $1,371 and $2,742 in 2016; previously included in accumulated other comprehensive income)	26,201	24,772	51,091	51,525
Interest on policyholders’ accounts	4,651	5,138	9,395	10,385
Total benefits, losses and expenses	286,924	278,909	544,894	515,820
Income before income taxes	55	864	25,144	29,638
Federal income tax expense (benefit) (includes reclassifications of $219 and $937 in 2017 and ($234) and ($138) in 2016; previously included in accumulated other comprehensive income)	(2,903)	(2,250)	2,250	4,097
Net income	2,958	3,114	22,894	25,541
Other comprehensive income
Change in net unrealized appreciation on investments	30,653	49,332	45,619	93,208
Change in liability for underfunded employee benefit plans	0	0	0	0
Other comprehensive income , before tax and reclassification adjustments	30,653	49,332	45,619	93,208
Income tax effect	(10,729)	(17,267)	(15,967)	(32,624)
Other comprehensive income, after tax, before reclassification adjustments	19,924	32,065	29,652	60,584
Reclassification adjustment for net realized investment gains included in income	(1,975)	(700)	(5,380)	(2,346)
Reclassification adjustment for employee benefit costs included in expense	1,352	1,371	2,704	2,742
Total reclassification adjustments, before tax	(623)	671	(2,676)	396
Income tax effect	219	(234)	937	(138)
Total reclassification adjustments, after tax	(404)	437	(1,739)	258
Comprehensive income	$ 22,478	$ 35,616	$ 50,807	$ 86,383
Weighted average common shares outstanding (in shares)	25,133,035	25,366,283	25,288,068	25,288,086
Basic earnings per common share (in dollars per share)	$ 0.12	$ 0.12	$ 0.91	$ 1.01
Diluted earnings per common share (in dollars per share)	$ 0.12	$ 0.12	$ 0.89	$ 1

Consolidated Statements of Inc5

Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Reclassifications for net unrealized gains on available-for-sale securities	$ 1,975	$ 700	$ 5,380	$ 2,346
Reclassification adjustment for employee benefit costs included in expense	1,352	1,371	2,704	2,742
Reclassifications adjustments - tax	$ 219	$ (234)	$ 937	$ (138)

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, 2016		$ 941,884	$ 25	$ 216,482	$ 616,322	$ 109,055
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased			0	(21,184)
Shares issued for stock-based awards			0	2,207
Compensation expense and related tax benefit for stock-based award grants				2,254
Net income		22,894			22,894
Dividends on common stock ($0.53 per share)					(13,380)
Change in net unrealized investment appreciation	[1]					26,156
Change in liability for underfunded employee benefit plans	[2]					1,757
All other changes in stockholders’ equity accounts		(2,190)
Balance, end of period at Jun. 30, 2017		962,588	25	199,759	625,836	136,968
Balance, beginning of year at Mar. 31, 2017						117,448
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,958
Balance, end of period at Jun. 30, 2017		$ 962,588	$ 25	$ 199,759	$ 625,836	$ 136,968
[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)	6 Months Ended
	Jun. 30, 2017$ / sharesshares
Statement of Stockholders' Equity [Abstract]
Stock repurchased (in shares)	496,608
Shares issued for stock-based awards (in shares)	104,634
Dividends on common stock, per share (in dollars per share) | $ / shares	$ 0.53

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows From Operating Activities
Net income	$ 22,894	$ 25,541
Adjustments to reconcile net income to net cash provided by operating activities
Net accretion of bond premium	7,857	7,076
Depreciation and amortization	2,333	3,179
Stock-based compensation expense	2,254	1,865
Net realized investment gains	(6,634)	(3,651)
Net cash flows from trading investments	(1,524)	256
Deferred income tax benefit	(1,040)	(1,761)
Changes in:
Accrued investment income	(474)	235
Premiums receivable	(55,664)	(63,334)
Deferred policy acquisition costs	(7,153)	(11,007)
Reinsurance receivables	(4,554)	(7,413)
Prepaid reinsurance premiums	(184)	(363)
Income taxes receivable	6,773	(12,341)
Other assets	(498)	47
Future policy benefits and losses, claims and loss settlement expenses	71,378	78,807
Unearned premiums	58,542	60,851
Accrued expenses and other liabilities	17,300	7,083
Income taxes payable	0	(4,917)
Deferred income taxes	(1,112)	(550)
Other, net	1,640	1,474
Total adjustments	89,240	55,536
Net cash provided by operating activities	112,134	81,077
Cash Flows From Investing Activities
Proceeds from sale of available-for-sale investments	5,059	3,042
Proceeds from call and maturity of held-to-maturity investments	7	14
Proceeds from call and maturity of available-for-sale investments	147,717	311,478
Proceeds from short-term and other investments	3,320	1,412
Purchase of available-for-sale investments	(174,022)	(338,213)
Purchase of short-term and other investments	(2,985)	(415)
Net purchases and sales of property and equipment	(3,861)	(2,825)
Net cash used in investing activities	(24,765)	(25,507)
Policyholders’ account balances
Deposits to investment and universal life contracts	38,382	45,467
Withdrawals from investment and universal life contracts	(73,826)	(81,672)
Payment of cash dividends	(13,380)	(11,898)
Repurchase of common stock	(21,184)	0
Issuance of common stock	2,207	6,138
Tax impact from issuance of common stock	0	(354)
Net cash used in financing activities	(67,801)	(42,319)
Net Change in Cash and Cash Equivalents	19,568	13,251
Cash and Cash Equivalents at Beginning of Period	110,853	106,449
Cash and Cash Equivalents at End of Period	$ 130,421	$ 119,700

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	6 Months Ended
	Jun. 30, 2017
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, 2016 . The review report of Ernst & Young LLP as of June 30, 2017 and for the three- and six-month periods ended June 30, 2017 and 2016 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 six-month periods ended June 30, 2017 and 2016 , we made payments for income taxes totaling $7,628 and $24,017 , respectively. We received a tax refund of $10,000 during the six-month period ended June 30, 2017 . We did no t receive a tax refund during the six-month period ended June 30, 2016. For the six-month periods ended June 30, 2017 and 2016 , 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 six-month period ended June 30, 2017 . Property & Casualty Insurance Life Insurance Total Recorded asset at beginning of period $ 93,362 $ 70,750 $ 164,112 Underwriting costs deferred 109,900 2,480 112,380 Amortization of deferred policy acquisition costs (101,859 ) (3,368 ) (105,227 ) Ending unamortized deferred policy acquisition costs $ 101,403 $ 69,862 $ 171,265 Impact of unrealized gains and losses on available-for-sale securities — (3,753 ) (3,753 ) Recorded asset at June 30, 2017 $ 101,403 $ 66,109 $ 167,512 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 $10,166 and $6,413 at June 30, 2017 and December 31, 2016 , 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 $2,250 and $4,097 for the six-month periods ended June 30, 2017 and 2016 , 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 June 30, 2017 or December 31, 2016 . 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 or for the year 2012. The Internal Revenue Service is conducting routine examinations of our income tax return for the 2011 and 2015 tax years. 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 2017 Share-Based Payments In March 2016, the Financial Accounting Standards Board ("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 adopted the new guidance prospectively as of January 1, 2017. The new guidance resulted in classification changes between the financing and operating section of the Statement of Cash Flow for stock based compensation expense. The adoption also resulted in a tax benefit of $354 and $484 during the three- and six-months ended June 30, 2017. 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 adopted the new guidance as of January 1, 2017. The adoption had no impact on the Company's financial position and results of operations since we do not currently report deferred taxes in classified balance sheets. Pending Adoption of Accounting Standards 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. The adoption of the new guidance will have no impact on the Company's reporting and disclosure of net premiums earned, net investment income or net realized gains and losses, as these items are not within the scope of this new guidance. The Company is currently evaluating the impact on the Company's financial position and results of operations with other revenue streams under this new guidance. These other revenue streams, currently reported in other income in the Consolidated Statements of Income and Comprehensive Income, are not a material amount of the Company's total revenue. 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, results of operations and key processes. If the new guidance were adopted as of March 31, 2017, there would be a reclassification from accumulated other comprehensive income to retained earnings equal to the amount of net unrealized gains and losses on available-for-sale equity securities at December 31, 2016 disclosed in Note 2 "Summary of Investments," of this section. The impact to net realized gains (losses) would equal the change in net unrealized gains and losses on available-for-sale equity securities between June 30, 2017 and December 31, 2016, in the same tables. 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 reviewing the updates to the eight existing cash flow issues. Currently, management believes that one existing cash flow issue will be impacted by these updates. Management believes the update will have no impact on the Company's financial position and results of operations but may effect the current classification of the cash flow in the Statement of Cash Flows. Defined Benefit Retirement Plan Cost In March 2017, the FASB issued guidance on the presentation of net periodic benefit costs of defined benefit retirement benefit plans in the Statements of Income. The new guidance requires the service cost component of net periodic benefit cost of defined benefit plans to be presented in the same line in the Statements of Income as other employee compensation expenses. Also, under the new guidance, the service cost component of the net periodic benefit costs will be the only portion of costs subject to be capitalized in assets. 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 presentation of net periodic benefit costs in its financial statements and 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. The Company has created an inventory of its leases and has calculated the current minimum future lease payment, which is disclosed in Note 13 "Lease Commitments" of our Annual Report on Form 10-K for the year ended December 31, 2016. 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, results of operations and key processes. Income Taxes - Intra-entity Transfers In October 2016, the FASB issued new guidance on the income tax treatment of intra-entity transfers. The new guidance replaces the current guidance which prohibits the recognition of current and deferred income taxes of intra-entity transfers until the asset is sold externally. Under the new guidance, the exemption is eliminated and income taxes will be recognized on transfers of intra-entity assets. The new guidance is effective for annual periods beginning after December 15, 2018 and interim periods beginning after December 15, 2019. 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. Goodwill In January 2017, the FASB issued new guidance which simplifies the test for goodwill impairment. The new guidance eliminates the implied fair value calculation when measuring a goodwill impairment charge. Under the new guidance, impairment charges will be based on the excess of the carrying value over fair value of goodwill. The new guidance is effective for annual and interim periods beginning after December 15, 2019. The Company will adopt the new guidance as of January 1, 2020 and is currently evaluating the impact on the Company's financial position and results of operations. Share-Based Payments In May 2017, the FASB issued new guidance which clarifies and addresses the diversity in practice when there is a change in the terms of a share-based payment award. The updated guidance clarifies when to use modification accounting when there is a change in the terms of a share-based payment and provides three conditions where modification accounting should not be applied. The new guidance is effective for annual and interim periods beginning after December 15, 2017. 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.

Summary of Investments

Summary of Investments	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 is as follows: June 30, 2017 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds - financial services $ 150 $ — $ — $ 150 Mortgage-backed securities 42 — — 42 Total Held-to-Maturity Fixed Maturities $ 192 $ — $ — $ 192 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 22,068 $ 56 $ 80 $ 22,044 U.S. government agency 79,643 1,574 424 80,793 States, municipalities and political subdivisions General obligations: Midwest 128,921 2,588 555 130,954 Northeast 54,322 1,348 91 55,579 South 141,845 2,496 1,350 142,991 West 120,651 2,468 1,165 121,954 Special revenue: Midwest 163,411 3,579 678 166,312 Northeast 80,282 926 1,229 79,979 South 258,666 3,871 3,547 258,990 West 152,224 2,614 2,377 152,461 Foreign bonds 55,503 1,987 — 57,490 Public utilities 207,437 4,474 240 211,671 Corporate bonds Energy 99,416 2,249 200 101,465 Industrials 214,919 5,726 219 220,426 Consumer goods and services 179,992 4,927 157 184,762 Health care 75,863 2,469 — 78,332 Technology, media and telecommunications 143,209 3,224 175 146,258 Financial services 261,314 6,763 526 267,551 Mortgage-backed securities 15,515 178 195 15,498 Collateralized mortgage obligations Government national mortgage association 155,129 2,228 1,490 155,867 Federal home loan mortgage corporation 194,556 2,566 2,894 194,228 Federal national mortgage association 103,061 2,367 752 104,676 Asset-backed securities 4,379 419 — 4,798 Total Available-for-Sale Fixed Maturities $ 2,912,326 $ 61,097 $ 18,344 $ 2,955,079 Equity securities: Common stocks Public utilities $ 6,394 $ 15,062 $ 140 $ 21,316 Energy 6,514 7,133 121 13,526 Industrials 13,116 44,356 181 57,291 Consumer goods and services 10,070 15,379 118 25,331 Health care 7,763 24,958 — 32,721 Technology, media and telecommunications 6,009 8,837 107 14,739 Financial services 11,630 98,733 51 110,312 Nonredeemable preferred stocks 1,037 33 — 1,070 Total Available-for-Sale Equity Securities $ 62,533 $ 214,491 $ 718 $ 276,306 Total Available-for-Sale Securities $ 2,974,859 $ 275,588 $ 19,062 $ 3,231,385 December 31, 2016 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds - financial services $ 150 $ — $ — $ 150 Mortgage-backed securities 48 1 — 49 Total Held-to-Maturity Fixed Maturities $ 198 $ 1 $ — $ 199 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 23,216 $ 87 $ 108 $ 23,195 U.S. government agency 76,692 1,445 540 77,597 States, municipalities and political subdivisions General obligations: Midwest 143,747 1,808 1,412 144,143 Northeast 57,731 909 231 58,409 South 129,475 1,249 2,355 128,369 West 114,524 1,380 2,173 113,731 Special revenue: Midwest 167,430 2,313 1,433 168,310 Northeast 70,202 487 2,624 68,065 South 244,225 1,753 6,791 239,187 West 134,287 1,509 4,052 131,744 Foreign bonds 62,995 2,239 — 65,234 Public utilities 212,360 3,761 447 215,674 Corporate bonds Energy 107,084 2,195 419 108,860 Industrials 225,526 5,359 982 229,903 Consumer goods and services 178,135 3,847 295 181,687 Health care 81,211 2,063 151 83,123 Technology, media and telecommunications 143,402 2,029 819 144,612 Financial services 269,981 5,328 1,358 273,951 Mortgage-backed securities 17,288 201 241 17,248 Collateralized mortgage obligations Government national mortgage association 145,947 1,279 2,766 144,460 Federal home loan mortgage corporation 176,226 1,638 3,406 174,458 Federal national mortgage association 101,414 1,816 1,334 101,896 Asset-backed securities 4,407 145 282 4,270 Total Available-for-Sale Fixed Maturities $ 2,887,505 $ 44,840 $ 34,219 $ 2,898,126 Equity securities: Common stocks Public utilities $ 6,394 $ 13,465 $ 188 $ 19,671 Energy 6,514 8,555 22 15,047 Industrials 13,252 38,715 173 51,794 Consumer goods and services 10,324 13,851 58 24,117 Health care 7,763 19,657 — 27,420 Technology, media and telecommunications 5,931 9,476 38 15,369 Financial services 17,289 98,728 67 115,950 Nonredeemable preferred stocks 1,037 11 — 1,048 Total Available-for-Sale Equity Securities $ 68,504 $ 202,458 $ 546 $ 270,416 Total Available-for-Sale Securities $ 2,956,009 $ 247,298 $ 34,765 $ 3,168,542 Maturities The amortized cost and fair value of held-to-maturity, available-for-sale and trading fixed maturity securities at June 30, 2017 , 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 June 30, 2017 Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 150 $ 150 $ 141,196 $ 142,309 $ 2,958 $ 3,300 Due after one year through five years — — 787,370 808,996 7,532 8,733 Due after five years through 10 years — — 769,568 788,131 1,302 1,379 Due after 10 years — — 741,552 740,576 2,153 2,416 Asset-backed securities — — 4,379 4,798 — — Mortgage-backed securities 42 42 15,515 15,498 — — Collateralized mortgage obligations — — 452,746 454,771 — — $ 192 $ 192 $ 2,912,326 $ 2,955,079 $ 13,945 $ 15,828 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 June 30, Six Months Ended June 30, 2017 2016 2017 2016 Net realized investment gains (losses) Fixed maturities: Available-for-sale $ 676 $ 846 $ 2,671 $ 1,362 Trading securities Change in fair value 176 98 547 371 Sales (11 ) 461 46 461 Equity securities: Available-for-sale 1,299 — 2,709 984 Trading securities Change in fair value 245 237 356 330 Sales 6 (26 ) 16 (26 ) Short-term investments — (43 ) — — Cash equivalents — 23 — 169 Real estate 289 — 289 — Total net realized investment gains $ 2,680 $ 1,596 $ 6,634 $ 3,651 The proceeds and gross realized gains on the sale of available-for-sale fixed maturity securities are as follows: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Proceeds from sales $ — $ 1,074 $ 5,059 $ 3,042 Gross realized gains — 54 2,300 975 Gross realized losses — — (78 ) — There were no sales of held-to-maturity securities during the three- and six-month periods ended June 30, 2017 and 2016 . 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 $22,440 and $20,034 at June 30, 2017 and December 31, 2016 , 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 $5,576 at June 30, 2017 . Unrealized Appreciation A summary of the changes in net unrealized investment appreciation during the reporting period is as follows: Six Months Ended June 30, 2017 2016 Change in net unrealized investment appreciation Available-for-sale fixed maturities $ 32,132 $ 98,381 Available-for-sale equity securities 11,861 12,700 Deferred policy acquisition costs (3,753 ) (20,220 ) Income tax effect (14,084 ) (31,802 ) Total change in net unrealized investment appreciation, net of tax $ 26,156 $ 59,059 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 June 30, 2017 and December 31, 2016 . 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 June 30, 2017 , 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 June 30, 2017 or at June 30, 2016 . 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 June 30, 2017 or at June 30, 2016 . Our largest unrealized loss greater than 12 months on an individual equity security at June 30, 2017 was $173 . 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. June 30, 2017 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 4 $ 10,159 $ 78 2 $ 1,604 $ 2 $ 11,763 $ 80 U.S. government agency 8 33,669 424 — — — 33,669 424 States, municipalities and political subdivisions General obligations Midwest 5 17,233 381 1 5,254 174 22,487 555 Northeast 1 3,574 91 — — — 3,574 91 South 15 36,447 839 2 9,271 511 45,718 1,350 West 9 29,069 1,061 1 2,029 104 31,098 1,165 Special revenue Midwest 12 28,702 678 — — — 28,702 678 Northeast 16 48,096 1,229 — — — 48,096 1,229 South 33 82,121 2,461 4 15,640 1,086 97,761 3,547 West 27 69,324 2,377 — — — 69,324 2,377 Public utilities 8 16,557 235 1 92 5 16,649 240 Corporate bonds Energy 5 12,755 200 — — — 12,755 200 Industrials 5 9,004 75 2 4,803 144 13,807 219 Consumer goods and services 8 13,832 157 — — — 13,832 157 Technology, media and telecommunications 7 20,121 62 2 10,584 113 30,705 175 Financial services 15 36,947 526 — — — 36,947 526 Mortgage-backed securities 14 8,927 152 2 996 43 9,923 195 Collateralized mortgage obligations Government national mortgage association 18 56,024 945 8 18,631 545 74,655 1,490 Federal home loan mortgage corporation 26 107,586 2,693 3 4,814 201 112,400 2,894 Federal national mortgage association 12 33,550 480 5 8,327 272 41,877 752 Total Available-for-Sale Fixed Maturities 248 $ 673,697 $ 15,144 33 $ 82,045 $ 3,200 $ 755,742 $ 18,344 Equity securities: Common stocks Public utilities — $ — $ — 1 $ 168 $ 140 $ 168 $ 140 Energy 2 553 95 1 160 26 713 121 Industrials — — — 6 231 181 231 181 Consumer goods and services 1 22 1 4 215 117 237 118 Technology, media and telecommunications 3 544 55 1 14 52 558 107 Financial services 1 52 3 2 166 48 218 51 Total Available-for-Sale Equity Securities 7 $ 1,171 $ 154 15 $ 954 $ 564 $ 2,125 $ 718 Total Available-for-Sale Securities 255 $ 674,868 $ 15,298 48 $ 82,999 $ 3,764 $ 757,867 $ 19,062 December 31, 2016 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 9 $ 10,800 $ 108 — $ — $ — $ 10,800 $ 108 U.S. government agency 10 36,593 540 — — — 36,593 540 States, municipalities and political subdivisions General obligations Midwest 27 40,545 1,412 — — — 40,545 1,412 Northeast 9 9,874 231 — — — 9,874 231 South 37 53,699 2,355 — — — 53,699 2,355 West 30 55,265 2,173 — — — 55,265 2,173 Special revenue Midwest 41 62,937 1,433 — — — 62,937 1,433 Northeast 22 54,993 2,624 — — — 54,993 2,624 South 79 152,979 6,791 — — — 152,979 6,791 West 44 81,676 4,052 — — — 81,676 4,052 Public utilities 20 38,511 423 2 2,122 24 40,633 447 Corporate bonds Energy 8 15,938 313 3 8,232 106 24,170 419 Industrials 24 42,854 596 3 5,641 386 48,495 982 Consumer goods and services 11 21,059 295 — — — 21,059 295 Health care 9 20,918 151 — — — 20,918 151 Technology, media and telecommunications 16 41,230 516 3 10,241 303 51,471 819 Financial services 37 75,286 1,358 — — — 75,286 1,358 Mortgage-backed securities 16 9,611 187 5 1,198 54 10,809 241 Collateralized mortgage obligations Government national mortgage association 36 82,430 2,261 9 13,603 505 96,033 2,766 Federal home loan mortgage corporation 41 105,775 3,165 3 5,141 241 110,916 3,406 Federal national mortgage association 27 46,633 1,091 4 4,341 243 50,974 1,334 Asset-backed securities 1 971 29 1 2,559 253 3,530 282 Total Available-for-Sale Fixed Maturities 554 $ 1,060,577 $ 32,104 33 $ 53,078 $ 2,115 $ 1,113,655 $ 34,219 Equity securities: Common stocks Public utilities — $ — $ — 3 $ 120 $ 188 $ 120 $ 188 Energy — — — 1 163 22 163 22 Industrials — — — 6 239 173 239 173 Consumer goods and services 3 282 55 2 15 3 297 58 Technology, media and telecommunications 7 26 5 8 33 33 59 38 Financial services 3 53 3 2 150 64 203 67 Total Available-for-Sale Equity Securities 13 $ 361 $ 63 22 $ 720 $ 483 $ 1,081 $ 546 Total Available-for-Sale Securities 567 $ 1,060,938 $ 32,167 55 $ 53,798 $ 2,598 $ 1,114,736 $ 34,765

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2017
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. 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. 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 June 30, 2017 , the cash surrender value of the COLI policies was $3,244 , 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. 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. A summary of the carrying value and estimated fair value of our financial instruments at June 30, 2017 and December 31, 2016 is as follows: June 30, 2017 December 31, 2016 Fair Value Carrying Value Fair Value Carrying Value Assets Investments Fixed maturities: Held-to-maturity securities $ 192 $ 192 $ 199 $ 198 Available-for-sale securities 2,955,079 2,955,079 2,898,126 2,898,126 Trading securities 15,828 15,828 14,390 14,390 Equity securities: Available-for-sale securities 276,306 276,306 270,416 270,416 Trading securities 6,612 6,612 5,644 5,644 Mortgage loans 3,765 3,573 3,895 3,706 Policy loans 5,499 5,499 5,366 5,366 Other long-term investments 65,664 65,664 67,639 67,639 Short-term investments 175 175 175 175 Cash and cash equivalents 130,421 130,421 110,853 110,853 Corporate-owned life insurance 3,244 3,244 2,592 2,592 Liabilities Policy reserves Annuity (accumulations) (1) $ 629,169 $ 631,070 $ 646,764 $ 666,711 Annuity (benefit payments) 143,925 94,323 144,283 95,129 (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 June 30, 2017 and December 31, 2016 : June 30, 2017 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 22,044 $ — $ 22,044 $ — U.S. government agency 80,793 — 80,793 — States, municipalities and political subdivisions General obligations Midwest 130,954 — 130,954 — Northeast 55,579 — 55,579 — South 142,991 — 142,991 — West 121,954 — 121,954 — Special revenue Midwest 166,312 — 166,235 77 Northeast 79,979 — 79,979 — South 258,990 — 258,990 — West 152,461 — 152,461 — Foreign bonds 57,490 — 57,490 — Public utilities 211,671 — 211,671 — Corporate bonds Energy 101,465 — 101,465 — Industrials 220,426 — 220,426 — Consumer goods and services 184,762 — 184,034 728 Health care 78,332 — 78,332 — Technology, media and telecommunications 146,258 — 146,258 — Financial services 267,551 — 259,223 8,328 Mortgage-backed securities 15,498 — 15,498 — Collateralized mortgage obligations Government national mortgage association 155,867 — 155,867 — Federal home loan mortgage corporation 194,228 — 194,228 — Federal national mortgage association 104,676 — 104,676 — Asset-backed securities 4,798 — 4,176 622 Total Available-for-Sale Fixed Maturities $ 2,955,079 $ — $ 2,945,324 $ 9,755 Equity securities: Common stocks Public utilities $ 21,316 $ 21,316 $ — $ — Energy 13,526 13,526 — — Industrials 57,291 57,291 — — Consumer goods and services 25,331 25,331 — — Health care 32,721 32,721 — — Technology, media and telecommunications 14,739 14,739 — — Financial services 110,312 110,312 — — Nonredeemable preferred stocks 1,070 475 — 595 Total Available-for-Sale Equity Securities $ 276,306 $ 275,711 $ — $ 595 Total Available-for-Sale Securities $ 3,231,385 $ 275,711 $ 2,945,324 $ 10,350 TRADING Fixed maturities: Corporate bonds Industrials $ 3,724 $ — $ 3,724 $ — Consumer goods and services 293 — 293 — Health care 3,708 — 3,708 — Technology, media and telecommunications 1,200 — 1,200 — Financial services 4,262 — 4,262 — Redeemable preferred stocks 2,641 2,641 — — Equity securities: Public utilities 819 819 — — Energy 216 216 — — Industrials 947 947 — — Consumer goods and services 1,200 1,200 — — Health care 370 370 — — Financial services 232 232 — — Nonredeemable preferred stocks 2,828 2,828 — — Total Trading Securities $ 22,440 $ 9,253 $ 13,187 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 14,641 $ 14,641 $ — $ — Corporate-Owned Life Insurance $ 3,244 $ — $ 3,244 $ — Total Assets Measured at Fair Value $ 3,271,885 $ 299,780 $ 2,961,755 $ 10,350 December 31, 2016 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 23,195 $ — $ 23,195 $ — U.S. government agency 77,597 — 77,597 — States, municipalities and political subdivisions General obligations Midwest 144,143 — 144,143 — Northeast 58,409 — 58,409 — South 128,369 — 128,369 — West 113,731 — 113,731 — Special revenue Midwest 168,310 — 168,142 168 Northeast 68,065 — 68,065 — South 239,187 — 239,187 — West 131,744 — 131,744 — Foreign bonds 65,234 — 65,234 — Public utilities 215,674 — 215,674 — Corporate bonds Energy 108,860 — 108,860 — Industrials 229,903 — 229,903 — Consumer goods and services 181,687 — 180,590 1,097 Health care 83,123 — 83,123 — Technology, media and telecommunications 144,612 — 144,612 — Financial services 273,951 — 265,154 8,797 Mortgage-backed securities 17,248 — 17,248 — Collateralized mortgage obligations Government national mortgage association 144,460 — 144,460 — Federal home loan mortgage corporation 174,458 — 174,458 — Federal national mortgage association 101,896 — 101,896 — Asset-backed securities 4,270 — 3,821 449 Total Available-for-Sale Fixed Maturities $ 2,898,126 $ — $ 2,887,615 $ 10,511 Equity securities: Common stocks Public utilities $ 19,671 $ 19,671 $ — $ — Energy 15,047 15,047 — — Industrials 51,794 51,794 — — Consumer goods and services 24,117 24,117 — — Health care 27,420 27,420 — — Technology, media and telecommunications 15,369 15,369 — — Financial services 115,950 111,958 — 3,992 Nonredeemable preferred stocks 1,048 453 — 595 Total Available-for-Sale Equity Securities $ 270,416 $ 265,829 $ — $ 4,587 Total Available-for-Sale Securities $ 3,168,542 $ 265,829 $ 2,887,615 $ 15,098 TRADING Fixed maturities: Bonds Corporate bonds Industrials $ 3,919 $ — $ 3,919 $ — Consumer goods and services 127 — 127 — Health care 3,410 — 3,410 — Technology, media and telecommunications 787 — 787 — Financial services 4,842 — 4,842 — Redeemable preferred stocks 1,305 1,305 — — Equity securities: Public utilities 613 613 — — Energy 286 286 — — Industrials 877 877 — — Consumer goods and services 1,202 1,202 — — Health care 339 339 — — Financial services 206 206 — — Nonredeemable preferred stocks 2,121 2,121 — — Total Trading Securities $ 20,034 $ 6,949 $ 13,085 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 16,802 $ 16,802 $ — $ — Corporate-Owned Life Insurance $ 2,592 $ — $ 2,592 $ — Total Assets Measured at Fair Value $ 3,208,145 $ 289,755 $ 2,903,292 $ 15,098 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 June 30, 2017 and December 31, 2016 was reasonable. For the three- and six-month periods ended June 30, 2017 , 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 six-month periods ended June 30, 2017 , 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 six-month periods ended June 30, 2017 , 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 June 30, 2017 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at March 31, 2017 $ 168 $ 9,494 $ 456 $ 4,718 $ 14,836 Net unrealized gains (losses) (1) (6 ) 68 166 — 228 Disposals (85 ) (506 ) — (4,123 ) (4,714 ) Balance at June 30, 2017 $ 77 $ 9,056 $ 622 $ 595 $ 10,350 (1) Net 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 six-month period ended June 30, 2017 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at January 1, 2017 $ 168 $ 9,894 $ 449 $ 4,587 $ 15,098 Net unrealized gains (losses) (1) (6 ) 1 173 — 168 Purchases — — — 145 145 Disposals (85 ) (839 ) — (4,137 ) (5,061 ) Balance at June 30, 2017 $ 77 $ 9,056 $ 622 $ 595 $ 10,350 (1) Net 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.

Reserves for Losses and Loss Se

Reserves for Losses and Loss Settlement Expenses	6 Months Ended
	Jun. 30, 2017
Insurance Loss Reserves [Abstract]
Reserves for Losses and Loss Settlement Expenses	RESERVES FOR LOSSES AND LOSS SETTLEMENT EXPENSES Property insurance indemnifies an insured with an interest in physical property for loss of, or damage to, such property or the loss of its income-producing abilities. Casualty insurance primarily covers liability for damage to property of, or injury to, a person or entity other than the insured. In most cases, casualty insurance also obligates the insurance company to provide a defense for the insured in litigation, arising out of events covered by the policy. Liabilities for losses and loss settlement expenses reflect management's best estimates at a given point in time of what we expect to pay for claims that have been reported and those that have been incurred but not reported ("IBNR"), based on known facts, circumstances, and historical trends. Because property and casualty insurance reserves are estimates of the unpaid portions of incurred losses that have been reported to us, as well as losses that have been incurred but not reported, the establishment of appropriate reserves, including reserves for catastrophes, is an inherently uncertain and complex process. The ultimate cost of losses and related loss settlement expenses may vary materially from recorded amounts. We regularly update our reserve estimates as new information becomes available and as events unfold that may affect the resolution of unsettled claims. Changes in prior year reserve estimates, which may be material, are reported as a component of losses and loss settlement expenses incurred in the period such changes are determined. The determination of reserves (particularly those relating to liability lines of insurance that have relatively longer lag in claim reporting) requires significant work to reasonably project expected future claim reporting and payment patterns. If, during the course of our regular monitoring of reserves, we determine that coverages previously written are incurring higher than expected losses, we will take action that may include, among other things, increasing the related reserves. Any adjustments we make to reserves are reflected in operating results in the year in which we make those adjustments. We engage an independent actuary, Regnier Consulting Group, Inc. ("Regnier"), to render an opinion as to the reasonableness of our statutory reserves annually. The actuarial opinion is filed in those states where we are licensed. On a quarterly basis, UFG's internal actuary performs a detailed actuarial review of IBNR reserves. This review includes a comparison of results from the most recent analysis of reserves completed by both our internal and external actuaries. Senior management meets with our internal actuary to review, on a regular and quarterly basis, the adequacy of carried reserves based on results from this actuarial analysis. There are two fundamental types or sources of IBNR reserves. We record IBNR reserves for "normal" types of claims and also specific IBNR reserves related to unique circumstances or events. A major hurricane is an example of an event that might necessitate establishing specific IBNR reserves because an analysis of existing historical data would not provide an appropriate estimate. We do not discount loss reserves based on the time value of money. The following table provides an analysis of changes in our property and casualty losses and loss settlement expense reserves at June 30, 2017 and December 31, 2016 (net of reinsurance amounts): June 30, 2017 December 31, 2016 Gross liability for losses and loss settlement expenses $ 1,123,896 $ 1,003,895 Ceded losses and loss settlement expenses (59,794 ) (54,653 ) Net liability for losses and loss settlement expenses $ 1,064,102 $ 949,242 Losses and loss settlement expenses incurred Current year $ 386,352 $ 683,662 Prior years (41,202 ) (31,229 ) Total incurred $ 345,150 $ 652,433 Losses and loss settlement expense payments Current year $ 116,808 $ 277,053 Prior years 175,126 260,520 Total paid $ 291,934 $ 537,573 Net liability for losses and loss settlement expenses $ 1,117,318 $ 1,064,102 Ceded loss and loss settlement expenses 63,160 59,794 Gross liability for losses and loss settlement expenses $ 1,180,478 $ 1,123,896 There are a multitude of factors that can impact loss reserve development. Those factors include, but are not limited to: historical data, the potential impact of various loss reserve development factors and trends including historical loss experience, legislative enactments, judicial decisions, legal developments in imposition of damages, experience with alternative dispute resolution, results of our medical bill review process, the potential impact of salvage and subrogation and changes and trends in general economic conditions, including the effects of inflation. All of these factors influence our estimates of required reserves and for long tail lines these factors can change over the course of the settlement of the claim. However, there is no precise method for evaluating the specific dollar impact of any individual factor on the development of reserves. The significant drivers of the favorable reserve development in 2017 was in our commercial liability or long-tail liability line of business and workers' compensation line of business. Much of the favorable long-tail liability development continues to come from loss adjustment expense and is attributed to our continued litigation management efforts. There was also a reduction in reserves for incurred but not reported claims because our long tail liability has experienced fewer late reported claims than what was initially anticipated. The majority of the favorable workers compensation development is due to reductions in reserves for reported claims which were greater than what was necessary to offset claim payments. Commercial fire and allied lines and assumed reinsurance exhibited adverse development, which provided a partial offset to the much larger favorable development previously noted. Assumed reinsurance was adversely affected by increases in reserves for reported claims while commercial fire adverse development is attributable to loss payments which were greater than reductions in reported loss reserves and reserves for claims incurred but not reported. The majority of adverse commercial fire development resulted from claim payments that exceeded reductions in reserves for reported claims. The significant drivers of the favorable reserve development in 2016 were our commercial liability and workers compensation. Much of the favorable commercial liability development came from loss adjustment expense and is attributed to our continued litigation management efforts. Workers compensation favorable development was due to the combined effects of decreases in claim reserves along with favorable changes affecting loss adjustment expense. Loss adjustment expense, closely tied to loss, generally decreases when loss decreases. Commercial property, commercial automobile and assumed reinsurance exhibited adverse development which provided a partial offset to the favorable development previously noted. The adverse development for all three lines is due to paid loss which was greater than reductions in reported loss reserves and reserves for claims incurred but not reported. No other single line of business contributed a significant portion of the total development. Generally, we base reserves for each claim on the estimated ultimate exposure for that claim. We believe that it is appropriate and reasonable to establish a best estimate for reserves within a range of reasonable estimates, especially when we are reserving for claims for bodily injury, disabilities and similar claims, for which settlements and verdicts can vary widely. Our reserving philosophy may result in favorable reserve development in future years that will decrease losses and loss settlement expenses for prior year claims in the year of adjustment. We realize that this philosophy, coupled with what we believe to be aggressive and successful claims management and loss settlement practices, has resulted in year-to-year redundancies in reserves. We believe our approach produces recorded reserves that are reasonably consistent as to their relative position within a range of reasonable reserves from year-to-year. However, conditions and trends that have affected the reserve development for a given year do change. Therefore, such development cannot be used to project future reserve redundancies or deficiencies. We are not aware of any significant contingent liabilities related to environmental issues. Because of the type of property coverage we write, we have potential exposure to environmental pollution, mold and asbestos claims. Our underwriters are aware of these exposures and use riders or endorsements to limit exposure.

Employee Benefits

Employee Benefits	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [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 June 30, 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 1,714 $ 1,623 $ 505 $ 932 Interest cost 1,765 1,663 482 754 Expected return on plan assets (2,412 ) (1,988 ) — — Amortization of prior service credit — — (1,352 ) — Amortization of net loss 891 992 461 379 Net periodic benefit cost $ 1,958 $ 2,290 $ 96 $ 2,065 Pension Plan Postretirement Benefit Plan Six Months Ended June 30, 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 3,427 $ 3,246 $ 1,010 $ 1,864 Interest cost 3,530 3,326 964 1,508 Expected return on plan assets (4,824 ) (3,976 ) — — Amortization of prior service credit — — (2,704 ) — Amortization of net loss 1,782 1,984 922 758 Net periodic benefit cost $ 3,915 $ 4,580 $ 192 $ 4,130 Employer Contributions We previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2016 that we expected to contribute $6,400 to the pension plan in 2017 . For the six-month period ended June 30, 2017 , we contributed $3,196 to the pension plan.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 , there were 997,259 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 have graded vesting over 3 years or 5 years from the grant date, unless the Board of Directors authorizes acceleration of vesting. Performance stock units cliff-vest after 3 years and the certification of performance results by UFG’s Compensation Committee. 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 UFG's 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 Six Months Ended June 30, 2017 From Inception to June 30, 2017 Beginning balance 1,248,651 1,900,000 Additional shares authorized — 1,500,000 Number of awards granted (254,620 ) (2,867,186 ) Number of awards forfeited or expired 3,228 464,445 Ending balance 997,259 997,259 Number of option awards exercised 74,466 1,023,534 Number of unrestricted stock awards granted 725 8,050 Number of restricted stock awards vested — 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 June 30, 2017 , we had 61,813 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 Six Months Ended June 30, 2017 From Inception to June 30, 2017 Beginning balance 74,771 300,000 Number of awards granted (12,958 ) (262,190 ) Number of awards forfeited or expired — 24,003 Ending balance 61,813 61,813 Number of option awards exercised 6,727 59,200 Number of restricted stock awards vested 22,716 54,272 Stock-Based Compensation Expense For the three-month periods ended June 30, 2017 and 2016 , we recognized stock-based compensation expense of $1,210 and $889 , respectively. For the six-month periods ended June 30, 2017 and 2016 , we recognized stock-based compensation expense of $2,254 and $1,865 , respectively. Stock-based compensation expense is recognized over the vesting period of the stock options. As of June 30, 2017 , we had $10,614 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 2017 and subsequent years according to the table below, 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. 2017 $ 2,371 2018 3,981 2019 2,718 2020 1,111 2021 393 2022 40 Total $ 10,614

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2017
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 six 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, 2016 . We have reconciled the amounts in the following table for the three-month periods ended June 30, 2017 and 2016 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 June 30, 2017 Net premiums earned $ 245,222 $ 14,341 $ 259,563 Investment income, net of investment expenses 12,208 12,426 24,634 Net realized investment gains 1,081 1,599 2,680 Other income — 126 126 Total reportable segment $ 258,511 $ 28,492 $ 287,003 Intersegment eliminations (24 ) — (24 ) Total revenues $ 258,487 $ 28,492 $ 286,979 Net income $ 109 $ 2,849 $ 2,958 Assets $ 2,595,147 $ 1,602,265 $ 4,197,412 Invested assets $ 1,836,736 $ 1,492,192 $ 3,328,928 As of and for the Three Months Ended June 30, 2016 Net premiums earned $ 232,282 $ 21,205 $ 253,487 Investment income, net of investment expenses 11,655 12,889 24,544 Net realized investment gains 966 630 1,596 Other income — 183 183 Total reportable segment $ 244,903 $ 34,907 $ 279,810 Intersegment eliminations (37 ) — (37 ) Total revenues $ 244,866 $ 34,907 $ 279,773 Net income (loss) $ 3,434 $ (320 ) $ 3,114 Assets $ 2,459,526 $ 1,646,312 $ 4,105,838 Invested assets $ 1,723,641 $ 1,547,765 $ 3,271,406 We have reconciled the amounts in the following table for the six-month periods ended June 30, 2017 and 2016 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 Six Months Ended June 30, 2017 Net premiums earned $ 481,666 $ 31,769 $ 513,435 Investment income, net of investment expenses 24,813 24,876 49,689 Net realized investment gains 3,330 3,304 6,634 Other income — 324 324 Total reportable segment $ 509,809 $ 60,273 $ 570,082 Intersegment eliminations (44 ) — (44 ) Total revenues $ 509,765 $ 60,273 $ 570,038 Net income $ 18,693 $ 4,201 $ 22,894 Assets $ 2,595,147 $ 1,602,265 $ 4,197,412 Invested assets $ 1,836,736 $ 1,492,192 $ 3,328,928 As of and for the Six Months Ended June 30, 2016 Net premiums earned $ 452,507 $ 42,278 $ 494,785 Investment income, net of investment expenses 21,064 25,741 46,805 Net realized investment gains 2,703 948 3,651 Other income — 291 291 Total reportable segment $ 476,274 $ 69,258 $ 545,532 Intersegment eliminations (74 ) — (74 ) Total revenues $ 476,200 $ 69,258 $ 545,458 Net income $ 25,454 $ 87 $ 25,541 Assets $ 2,459,526 $ 1,646,312 $ 4,105,838 Invested assets $ 1,723,641 $ 1,547,765 $ 3,271,406

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and 2016 : Three Months Ended June 30, (In Thousands, Except Share Data) 2017 2016 Basic Diluted Basic Diluted Net income $ 2,958 $ 2,958 $ 3,114 $ 3,114 Weighted-average common shares outstanding 25,133,035 25,133,035 25,366,283 25,366,283 Add dilutive effect of restricted stock unit awards — 248,717 — 155,270 Add dilutive effect of stock options — 242,934 — 273,923 Weighted-average common shares 25,133,035 25,624,686 25,366,283 25,795,476 Earnings per common share $ 0.12 $ 0.12 $ 0.12 $ 0.12 Awards excluded from diluted earnings per share calculation (1) — — — — (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 six-month periods ended June 30, 2017 and 2016 : Six Months Ended June 30, (In Thousands, Except Share Data) 2017 2016 Basic Diluted Basic Diluted Net income $ 22,894 $ 22,894 $ 25,541 $ 25,541 Weighted-average common shares outstanding 25,288,068 25,288,068 25,288,086 25,288,086 Add dilutive effect of restricted stock unit awards — 248,717 — 155,270 Add dilutive effect of stock options — 215,740 — 186,221 Weighted-average common shares 25,288,068 25,752,525 25,288,086 25,629,577 Earnings per common share $ 0.91 $ 0.89 $ 1.01 $ 1.00 Awards excluded from diluted earnings per share calculation (1) — — — — (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	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Credit Facility	CREDIT FACILITY On February 2, 2016, the Company, as borrower, entered into a Credit Agreement (the "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 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 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 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 Credit Agreement is due and payable in full at maturity on February 2, 2020. Based on the type of loan, advances under the 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 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 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 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 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. There was no outstanding balance on the Credit Agreement at June 30, 2017 and 2016 , respectively. For the six-month periods ended June 30, 2017 and 2016 , we did no t incur any interest expense related to either credit facility. We were in compliance with all covenants of the Credit Agreement at June 30, 2017 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of March 31, 2017 $ 141,407 $ (23,959 ) $ 117,448 Change in accumulated other comprehensive income before reclassifications 19,924 — 19,924 Reclassification adjustments from accumulated other comprehensive income (loss) (1,283 ) 879 (404 ) Balance as of June 30, 2017 $ 160,048 $ (23,080 ) $ 136,968 (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 six-month period ended June 30, 2017 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of January 1, 2017 $ 133,892 $ (24,837 ) $ 109,055 Change in accumulated other comprehensive income before reclassifications 29,652 — 29,652 Reclassification adjustments from accumulated other comprehensive income (loss) (3,496 ) 1,757 (1,739 ) Balance as of June 30, 2017 $ 160,048 $ (23,080 ) $ 136,968 (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 Basi19

Nature of Operations and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2017
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 six-month period ended June 30, 2017 . Property & Casualty Insurance Life Insurance Total Recorded asset at beginning of period $ 93,362 $ 70,750 $ 164,112 Underwriting costs deferred 109,900 2,480 112,380 Amortization of deferred policy acquisition costs (101,859 ) (3,368 ) (105,227 ) Ending unamortized deferred policy acquisition costs $ 101,403 $ 69,862 $ 171,265 Impact of unrealized gains and losses on available-for-sale securities — (3,753 ) (3,753 ) Recorded asset at June 30, 2017 $ 101,403 $ 66,109 $ 167,512 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 $2,250 and $4,097 for the six-month periods ended June 30, 2017 and 2016 , 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 June 30, 2017 or December 31, 2016 . 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 or for the year 2012. The Internal Revenue Service is conducting routine examinations of our income tax return for the 2011 and 2015 tax years.
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 2017 Share-Based Payments In March 2016, the Financial Accounting Standards Board ("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 adopted the new guidance prospectively as of January 1, 2017. The new guidance resulted in classification changes between the financing and operating section of the Statement of Cash Flow for stock based compensation expense. The adoption also resulted in a tax benefit of $354 and $484 during the three- and six-months ended June 30, 2017. 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 adopted the new guidance as of January 1, 2017. The adoption had no impact on the Company's financial position and results of operations since we do not currently report deferred taxes in classified balance sheets. Pending Adoption of Accounting Standards 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. The adoption of the new guidance will have no impact on the Company's reporting and disclosure of net premiums earned, net investment income or net realized gains and losses, as these items are not within the scope of this new guidance. The Company is currently evaluating the impact on the Company's financial position and results of operations with other revenue streams under this new guidance. These other revenue streams, currently reported in other income in the Consolidated Statements of Income and Comprehensive Income, are not a material amount of the Company's total revenue. 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, results of operations and key processes. If the new guidance were adopted as of March 31, 2017, there would be a reclassification from accumulated other comprehensive income to retained earnings equal to the amount of net unrealized gains and losses on available-for-sale equity securities at December 31, 2016 disclosed in Note 2 "Summary of Investments," of this section. The impact to net realized gains (losses) would equal the change in net unrealized gains and losses on available-for-sale equity securities between June 30, 2017 and December 31, 2016, in the same tables. 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 reviewing the updates to the eight existing cash flow issues. Currently, management believes that one existing cash flow issue will be impacted by these updates. Management believes the update will have no impact on the Company's financial position and results of operations but may effect the current classification of the cash flow in the Statement of Cash Flows. Defined Benefit Retirement Plan Cost In March 2017, the FASB issued guidance on the presentation of net periodic benefit costs of defined benefit retirement benefit plans in the Statements of Income. The new guidance requires the service cost component of net periodic benefit cost of defined benefit plans to be presented in the same line in the Statements of Income as other employee compensation expenses. Also, under the new guidance, the service cost component of the net periodic benefit costs will be the only portion of costs subject to be capitalized in assets. 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 presentation of net periodic benefit costs in its financial statements and 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. The Company has created an inventory of its leases and has calculated the current minimum future lease payment, which is disclosed in Note 13 "Lease Commitments" of our Annual Report on Form 10-K for the year ended December 31, 2016. 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, results of operations and key processes. Income Taxes - Intra-entity Transfers In October 2016, the FASB issued new guidance on the income tax treatment of intra-entity transfers. The new guidance replaces the current guidance which prohibits the recognition of current and deferred income taxes of intra-entity transfers until the asset is sold externally. Under the new guidance, the exemption is eliminated and income taxes will be recognized on transfers of intra-entity assets. The new guidance is effective for annual periods beginning after December 15, 2018 and interim periods beginning after December 15, 2019. 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. Goodwill In January 2017, the FASB issued new guidance which simplifies the test for goodwill impairment. The new guidance eliminates the implied fair value calculation when measuring a goodwill impairment charge. Under the new guidance, impairment charges will be based on the excess of the carrying value over fair value of goodwill. The new guidance is effective for annual and interim periods beginning after December 15, 2019. The Company will adopt the new guidance as of January 1, 2020 and is currently evaluating the impact on the Company's financial position and results of operations. Share-Based Payments In May 2017, the FASB issued new guidance which clarifies and addresses the diversity in practice when there is a change in the terms of a share-based payment award. The updated guidance clarifies when to use modification accounting when there is a change in the terms of a share-based payment and provides three conditions where modification accounting should not be applied. The new guidance is effective for annual and interim periods beginning after December 15, 2017. 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.
Fair Value Measurement	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 June 30, 2017 and December 31, 2016 was reasonable. For the three- and six-month periods ended June 30, 2017 , 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 six-month periods ended June 30, 2017 , 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 six-month periods ended June 30, 2017 , there were no securities transferred in or out of Level 3. 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. 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. 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 June 30, 2017 , the cash surrender value of the COLI policies was $3,244 , 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. 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.
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 six 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, 2016 .
Earnings Per 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.

Nature of Operations and Basi20

Nature of Operations and Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2017
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 six-month period ended June 30, 2017 . Property & Casualty Insurance Life Insurance Total Recorded asset at beginning of period $ 93,362 $ 70,750 $ 164,112 Underwriting costs deferred 109,900 2,480 112,380 Amortization of deferred policy acquisition costs (101,859 ) (3,368 ) (105,227 ) Ending unamortized deferred policy acquisition costs $ 101,403 $ 69,862 $ 171,265 Impact of unrealized gains and losses on available-for-sale securities — (3,753 ) (3,753 ) Recorded asset at June 30, 2017 $ 101,403 $ 66,109 $ 167,512

Summary of Investments (Tables)

Summary of Investments (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 is as follows: June 30, 2017 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds - financial services $ 150 $ — $ — $ 150 Mortgage-backed securities 42 — — 42 Total Held-to-Maturity Fixed Maturities $ 192 $ — $ — $ 192 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 22,068 $ 56 $ 80 $ 22,044 U.S. government agency 79,643 1,574 424 80,793 States, municipalities and political subdivisions General obligations: Midwest 128,921 2,588 555 130,954 Northeast 54,322 1,348 91 55,579 South 141,845 2,496 1,350 142,991 West 120,651 2,468 1,165 121,954 Special revenue: Midwest 163,411 3,579 678 166,312 Northeast 80,282 926 1,229 79,979 South 258,666 3,871 3,547 258,990 West 152,224 2,614 2,377 152,461 Foreign bonds 55,503 1,987 — 57,490 Public utilities 207,437 4,474 240 211,671 Corporate bonds Energy 99,416 2,249 200 101,465 Industrials 214,919 5,726 219 220,426 Consumer goods and services 179,992 4,927 157 184,762 Health care 75,863 2,469 — 78,332 Technology, media and telecommunications 143,209 3,224 175 146,258 Financial services 261,314 6,763 526 267,551 Mortgage-backed securities 15,515 178 195 15,498 Collateralized mortgage obligations Government national mortgage association 155,129 2,228 1,490 155,867 Federal home loan mortgage corporation 194,556 2,566 2,894 194,228 Federal national mortgage association 103,061 2,367 752 104,676 Asset-backed securities 4,379 419 — 4,798 Total Available-for-Sale Fixed Maturities $ 2,912,326 $ 61,097 $ 18,344 $ 2,955,079 Equity securities: Common stocks Public utilities $ 6,394 $ 15,062 $ 140 $ 21,316 Energy 6,514 7,133 121 13,526 Industrials 13,116 44,356 181 57,291 Consumer goods and services 10,070 15,379 118 25,331 Health care 7,763 24,958 — 32,721 Technology, media and telecommunications 6,009 8,837 107 14,739 Financial services 11,630 98,733 51 110,312 Nonredeemable preferred stocks 1,037 33 — 1,070 Total Available-for-Sale Equity Securities $ 62,533 $ 214,491 $ 718 $ 276,306 Total Available-for-Sale Securities $ 2,974,859 $ 275,588 $ 19,062 $ 3,231,385 December 31, 2016 Type of Investment Cost or Amortized Cost Gross Unrealized Appreciation Gross Unrealized Depreciation Fair Value HELD-TO-MATURITY Fixed maturities: Bonds Corporate bonds - financial services $ 150 $ — $ — $ 150 Mortgage-backed securities 48 1 — 49 Total Held-to-Maturity Fixed Maturities $ 198 $ 1 $ — $ 199 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 23,216 $ 87 $ 108 $ 23,195 U.S. government agency 76,692 1,445 540 77,597 States, municipalities and political subdivisions General obligations: Midwest 143,747 1,808 1,412 144,143 Northeast 57,731 909 231 58,409 South 129,475 1,249 2,355 128,369 West 114,524 1,380 2,173 113,731 Special revenue: Midwest 167,430 2,313 1,433 168,310 Northeast 70,202 487 2,624 68,065 South 244,225 1,753 6,791 239,187 West 134,287 1,509 4,052 131,744 Foreign bonds 62,995 2,239 — 65,234 Public utilities 212,360 3,761 447 215,674 Corporate bonds Energy 107,084 2,195 419 108,860 Industrials 225,526 5,359 982 229,903 Consumer goods and services 178,135 3,847 295 181,687 Health care 81,211 2,063 151 83,123 Technology, media and telecommunications 143,402 2,029 819 144,612 Financial services 269,981 5,328 1,358 273,951 Mortgage-backed securities 17,288 201 241 17,248 Collateralized mortgage obligations Government national mortgage association 145,947 1,279 2,766 144,460 Federal home loan mortgage corporation 176,226 1,638 3,406 174,458 Federal national mortgage association 101,414 1,816 1,334 101,896 Asset-backed securities 4,407 145 282 4,270 Total Available-for-Sale Fixed Maturities $ 2,887,505 $ 44,840 $ 34,219 $ 2,898,126 Equity securities: Common stocks Public utilities $ 6,394 $ 13,465 $ 188 $ 19,671 Energy 6,514 8,555 22 15,047 Industrials 13,252 38,715 173 51,794 Consumer goods and services 10,324 13,851 58 24,117 Health care 7,763 19,657 — 27,420 Technology, media and telecommunications 5,931 9,476 38 15,369 Financial services 17,289 98,728 67 115,950 Nonredeemable preferred stocks 1,037 11 — 1,048 Total Available-for-Sale Equity Securities $ 68,504 $ 202,458 $ 546 $ 270,416 Total Available-for-Sale Securities $ 2,956,009 $ 247,298 $ 34,765 $ 3,168,542
Maturities	The amortized cost and fair value of held-to-maturity, available-for-sale and trading fixed maturity securities at June 30, 2017 , 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 June 30, 2017 Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 150 $ 150 $ 141,196 $ 142,309 $ 2,958 $ 3,300 Due after one year through five years — — 787,370 808,996 7,532 8,733 Due after five years through 10 years — — 769,568 788,131 1,302 1,379 Due after 10 years — — 741,552 740,576 2,153 2,416 Asset-backed securities — — 4,379 4,798 — — Mortgage-backed securities 42 42 15,515 15,498 — — Collateralized mortgage obligations — — 452,746 454,771 — — $ 192 $ 192 $ 2,912,326 $ 2,955,079 $ 13,945 $ 15,828
Net Realized Investment Gains and Losses	A summary of the components of net realized investment gains (losses) is as follows: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Net realized investment gains (losses) Fixed maturities: Available-for-sale $ 676 $ 846 $ 2,671 $ 1,362 Trading securities Change in fair value 176 98 547 371 Sales (11 ) 461 46 461 Equity securities: Available-for-sale 1,299 — 2,709 984 Trading securities Change in fair value 245 237 356 330 Sales 6 (26 ) 16 (26 ) Short-term investments — (43 ) — — Cash equivalents — 23 — 169 Real estate 289 — 289 — Total net realized investment gains $ 2,680 $ 1,596 $ 6,634 $ 3,651
Proceeds and Gross Realized Gains and Losses	The proceeds and gross realized gains on the sale of available-for-sale fixed maturity securities are as follows: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Proceeds from sales $ — $ 1,074 $ 5,059 $ 3,042 Gross realized gains — 54 2,300 975 Gross realized losses — — (78 ) —
Unrealized Investment Appreciation	A summary of the changes in net unrealized investment appreciation during the reporting period is as follows: Six Months Ended June 30, 2017 2016 Change in net unrealized investment appreciation Available-for-sale fixed maturities $ 32,132 $ 98,381 Available-for-sale equity securities 11,861 12,700 Deferred policy acquisition costs (3,753 ) (20,220 ) Income tax effect (14,084 ) (31,802 ) Total change in net unrealized investment appreciation, net of tax $ 26,156 $ 59,059
Investments in Unrealized Loss Position	June 30, 2017 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 4 $ 10,159 $ 78 2 $ 1,604 $ 2 $ 11,763 $ 80 U.S. government agency 8 33,669 424 — — — 33,669 424 States, municipalities and political subdivisions General obligations Midwest 5 17,233 381 1 5,254 174 22,487 555 Northeast 1 3,574 91 — — — 3,574 91 South 15 36,447 839 2 9,271 511 45,718 1,350 West 9 29,069 1,061 1 2,029 104 31,098 1,165 Special revenue Midwest 12 28,702 678 — — — 28,702 678 Northeast 16 48,096 1,229 — — — 48,096 1,229 South 33 82,121 2,461 4 15,640 1,086 97,761 3,547 West 27 69,324 2,377 — — — 69,324 2,377 Public utilities 8 16,557 235 1 92 5 16,649 240 Corporate bonds Energy 5 12,755 200 — — — 12,755 200 Industrials 5 9,004 75 2 4,803 144 13,807 219 Consumer goods and services 8 13,832 157 — — — 13,832 157 Technology, media and telecommunications 7 20,121 62 2 10,584 113 30,705 175 Financial services 15 36,947 526 — — — 36,947 526 Mortgage-backed securities 14 8,927 152 2 996 43 9,923 195 Collateralized mortgage obligations Government national mortgage association 18 56,024 945 8 18,631 545 74,655 1,490 Federal home loan mortgage corporation 26 107,586 2,693 3 4,814 201 112,400 2,894 Federal national mortgage association 12 33,550 480 5 8,327 272 41,877 752 Total Available-for-Sale Fixed Maturities 248 $ 673,697 $ 15,144 33 $ 82,045 $ 3,200 $ 755,742 $ 18,344 Equity securities: Common stocks Public utilities — $ — $ — 1 $ 168 $ 140 $ 168 $ 140 Energy 2 553 95 1 160 26 713 121 Industrials — — — 6 231 181 231 181 Consumer goods and services 1 22 1 4 215 117 237 118 Technology, media and telecommunications 3 544 55 1 14 52 558 107 Financial services 1 52 3 2 166 48 218 51 Total Available-for-Sale Equity Securities 7 $ 1,171 $ 154 15 $ 954 $ 564 $ 2,125 $ 718 Total Available-for-Sale Securities 255 $ 674,868 $ 15,298 48 $ 82,999 $ 3,764 $ 757,867 $ 19,062 December 31, 2016 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 9 $ 10,800 $ 108 — $ — $ — $ 10,800 $ 108 U.S. government agency 10 36,593 540 — — — 36,593 540 States, municipalities and political subdivisions General obligations Midwest 27 40,545 1,412 — — — 40,545 1,412 Northeast 9 9,874 231 — — — 9,874 231 South 37 53,699 2,355 — — — 53,699 2,355 West 30 55,265 2,173 — — — 55,265 2,173 Special revenue Midwest 41 62,937 1,433 — — — 62,937 1,433 Northeast 22 54,993 2,624 — — — 54,993 2,624 South 79 152,979 6,791 — — — 152,979 6,791 West 44 81,676 4,052 — — — 81,676 4,052 Public utilities 20 38,511 423 2 2,122 24 40,633 447 Corporate bonds Energy 8 15,938 313 3 8,232 106 24,170 419 Industrials 24 42,854 596 3 5,641 386 48,495 982 Consumer goods and services 11 21,059 295 — — — 21,059 295 Health care 9 20,918 151 — — — 20,918 151 Technology, media and telecommunications 16 41,230 516 3 10,241 303 51,471 819 Financial services 37 75,286 1,358 — — — 75,286 1,358 Mortgage-backed securities 16 9,611 187 5 1,198 54 10,809 241 Collateralized mortgage obligations Government national mortgage association 36 82,430 2,261 9 13,603 505 96,033 2,766 Federal home loan mortgage corporation 41 105,775 3,165 3 5,141 241 110,916 3,406 Federal national mortgage association 27 46,633 1,091 4 4,341 243 50,974 1,334 Asset-backed securities 1 971 29 1 2,559 253 3,530 282 Total Available-for-Sale Fixed Maturities 554 $ 1,060,577 $ 32,104 33 $ 53,078 $ 2,115 $ 1,113,655 $ 34,219 Equity securities: Common stocks Public utilities — $ — $ — 3 $ 120 $ 188 $ 120 $ 188 Energy — — — 1 163 22 163 22 Industrials — — — 6 239 173 239 173 Consumer goods and services 3 282 55 2 15 3 297 58 Technology, media and telecommunications 7 26 5 8 33 33 59 38 Financial services 3 53 3 2 150 64 203 67 Total Available-for-Sale Equity Securities 13 $ 361 $ 63 22 $ 720 $ 483 $ 1,081 $ 546 Total Available-for-Sale Securities 567 $ 1,060,938 $ 32,167 55 $ 53,798 $ 2,598 $ 1,114,736 $ 34,765

Fair Value of Financial Instr22

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 is as follows: June 30, 2017 December 31, 2016 Fair Value Carrying Value Fair Value Carrying Value Assets Investments Fixed maturities: Held-to-maturity securities $ 192 $ 192 $ 199 $ 198 Available-for-sale securities 2,955,079 2,955,079 2,898,126 2,898,126 Trading securities 15,828 15,828 14,390 14,390 Equity securities: Available-for-sale securities 276,306 276,306 270,416 270,416 Trading securities 6,612 6,612 5,644 5,644 Mortgage loans 3,765 3,573 3,895 3,706 Policy loans 5,499 5,499 5,366 5,366 Other long-term investments 65,664 65,664 67,639 67,639 Short-term investments 175 175 175 175 Cash and cash equivalents 130,421 130,421 110,853 110,853 Corporate-owned life insurance 3,244 3,244 2,592 2,592 Liabilities Policy reserves Annuity (accumulations) (1) $ 629,169 $ 631,070 $ 646,764 $ 666,711 Annuity (benefit payments) 143,925 94,323 144,283 95,129 (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 June 30, 2017 and December 31, 2016 : June 30, 2017 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 22,044 $ — $ 22,044 $ — U.S. government agency 80,793 — 80,793 — States, municipalities and political subdivisions General obligations Midwest 130,954 — 130,954 — Northeast 55,579 — 55,579 — South 142,991 — 142,991 — West 121,954 — 121,954 — Special revenue Midwest 166,312 — 166,235 77 Northeast 79,979 — 79,979 — South 258,990 — 258,990 — West 152,461 — 152,461 — Foreign bonds 57,490 — 57,490 — Public utilities 211,671 — 211,671 — Corporate bonds Energy 101,465 — 101,465 — Industrials 220,426 — 220,426 — Consumer goods and services 184,762 — 184,034 728 Health care 78,332 — 78,332 — Technology, media and telecommunications 146,258 — 146,258 — Financial services 267,551 — 259,223 8,328 Mortgage-backed securities 15,498 — 15,498 — Collateralized mortgage obligations Government national mortgage association 155,867 — 155,867 — Federal home loan mortgage corporation 194,228 — 194,228 — Federal national mortgage association 104,676 — 104,676 — Asset-backed securities 4,798 — 4,176 622 Total Available-for-Sale Fixed Maturities $ 2,955,079 $ — $ 2,945,324 $ 9,755 Equity securities: Common stocks Public utilities $ 21,316 $ 21,316 $ — $ — Energy 13,526 13,526 — — Industrials 57,291 57,291 — — Consumer goods and services 25,331 25,331 — — Health care 32,721 32,721 — — Technology, media and telecommunications 14,739 14,739 — — Financial services 110,312 110,312 — — Nonredeemable preferred stocks 1,070 475 — 595 Total Available-for-Sale Equity Securities $ 276,306 $ 275,711 $ — $ 595 Total Available-for-Sale Securities $ 3,231,385 $ 275,711 $ 2,945,324 $ 10,350 TRADING Fixed maturities: Corporate bonds Industrials $ 3,724 $ — $ 3,724 $ — Consumer goods and services 293 — 293 — Health care 3,708 — 3,708 — Technology, media and telecommunications 1,200 — 1,200 — Financial services 4,262 — 4,262 — Redeemable preferred stocks 2,641 2,641 — — Equity securities: Public utilities 819 819 — — Energy 216 216 — — Industrials 947 947 — — Consumer goods and services 1,200 1,200 — — Health care 370 370 — — Financial services 232 232 — — Nonredeemable preferred stocks 2,828 2,828 — — Total Trading Securities $ 22,440 $ 9,253 $ 13,187 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 14,641 $ 14,641 $ — $ — Corporate-Owned Life Insurance $ 3,244 $ — $ 3,244 $ — Total Assets Measured at Fair Value $ 3,271,885 $ 299,780 $ 2,961,755 $ 10,350 December 31, 2016 Fair Value Measurements Description Total Level 1 Level 2 Level 3 AVAILABLE-FOR-SALE Fixed maturities: Bonds U.S. Treasury $ 23,195 $ — $ 23,195 $ — U.S. government agency 77,597 — 77,597 — States, municipalities and political subdivisions General obligations Midwest 144,143 — 144,143 — Northeast 58,409 — 58,409 — South 128,369 — 128,369 — West 113,731 — 113,731 — Special revenue Midwest 168,310 — 168,142 168 Northeast 68,065 — 68,065 — South 239,187 — 239,187 — West 131,744 — 131,744 — Foreign bonds 65,234 — 65,234 — Public utilities 215,674 — 215,674 — Corporate bonds Energy 108,860 — 108,860 — Industrials 229,903 — 229,903 — Consumer goods and services 181,687 — 180,590 1,097 Health care 83,123 — 83,123 — Technology, media and telecommunications 144,612 — 144,612 — Financial services 273,951 — 265,154 8,797 Mortgage-backed securities 17,248 — 17,248 — Collateralized mortgage obligations Government national mortgage association 144,460 — 144,460 — Federal home loan mortgage corporation 174,458 — 174,458 — Federal national mortgage association 101,896 — 101,896 — Asset-backed securities 4,270 — 3,821 449 Total Available-for-Sale Fixed Maturities $ 2,898,126 $ — $ 2,887,615 $ 10,511 Equity securities: Common stocks Public utilities $ 19,671 $ 19,671 $ — $ — Energy 15,047 15,047 — — Industrials 51,794 51,794 — — Consumer goods and services 24,117 24,117 — — Health care 27,420 27,420 — — Technology, media and telecommunications 15,369 15,369 — — Financial services 115,950 111,958 — 3,992 Nonredeemable preferred stocks 1,048 453 — 595 Total Available-for-Sale Equity Securities $ 270,416 $ 265,829 $ — $ 4,587 Total Available-for-Sale Securities $ 3,168,542 $ 265,829 $ 2,887,615 $ 15,098 TRADING Fixed maturities: Bonds Corporate bonds Industrials $ 3,919 $ — $ 3,919 $ — Consumer goods and services 127 — 127 — Health care 3,410 — 3,410 — Technology, media and telecommunications 787 — 787 — Financial services 4,842 — 4,842 — Redeemable preferred stocks 1,305 1,305 — — Equity securities: Public utilities 613 613 — — Energy 286 286 — — Industrials 877 877 — — Consumer goods and services 1,202 1,202 — — Health care 339 339 — — Financial services 206 206 — — Nonredeemable preferred stocks 2,121 2,121 — — Total Trading Securities $ 20,034 $ 6,949 $ 13,085 $ — Short-Term Investments $ 175 $ 175 $ — $ — Money Market Accounts $ 16,802 $ 16,802 $ — $ — Corporate-Owned Life Insurance $ 2,592 $ — $ 2,592 $ — Total Assets Measured at Fair Value $ 3,208,145 $ 289,755 $ 2,903,292 $ 15,098
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 June 30, 2017 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at March 31, 2017 $ 168 $ 9,494 $ 456 $ 4,718 $ 14,836 Net unrealized gains (losses) (1) (6 ) 68 166 — 228 Disposals (85 ) (506 ) — (4,123 ) (4,714 ) Balance at June 30, 2017 $ 77 $ 9,056 $ 622 $ 595 $ 10,350 (1) Net 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 six-month period ended June 30, 2017 : States, municipalities and political subdivisions Corporate bonds Asset-backed securities Equities Total Balance at January 1, 2017 $ 168 $ 9,894 $ 449 $ 4,587 $ 15,098 Net unrealized gains (losses) (1) (6 ) 1 173 — 168 Purchases — — — 145 145 Disposals (85 ) (839 ) — (4,137 ) (5,061 ) Balance at June 30, 2017 $ 77 $ 9,056 $ 622 $ 595 $ 10,350 (1) Net unrealized gains (losses) are recorded as a component of comprehensive income.

Reserves for Losses and Loss 23

Reserves for Losses and Loss Settlement Expenses (Tables)	6 Months Ended
	Jun. 30, 2017
Insurance Loss Reserves [Abstract]
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense	The following table provides an analysis of changes in our property and casualty losses and loss settlement expense reserves at June 30, 2017 and December 31, 2016 (net of reinsurance amounts): June 30, 2017 December 31, 2016 Gross liability for losses and loss settlement expenses $ 1,123,896 $ 1,003,895 Ceded losses and loss settlement expenses (59,794 ) (54,653 ) Net liability for losses and loss settlement expenses $ 1,064,102 $ 949,242 Losses and loss settlement expenses incurred Current year $ 386,352 $ 683,662 Prior years (41,202 ) (31,229 ) Total incurred $ 345,150 $ 652,433 Losses and loss settlement expense payments Current year $ 116,808 $ 277,053 Prior years 175,126 260,520 Total paid $ 291,934 $ 537,573 Net liability for losses and loss settlement expenses $ 1,117,318 $ 1,064,102 Ceded loss and loss settlement expenses 63,160 59,794 Gross liability for losses and loss settlement expenses $ 1,180,478 $ 1,123,896

Employee Benefits (Tables)

Employee Benefits (Tables)	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [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 June 30, 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 1,714 $ 1,623 $ 505 $ 932 Interest cost 1,765 1,663 482 754 Expected return on plan assets (2,412 ) (1,988 ) — — Amortization of prior service credit — — (1,352 ) — Amortization of net loss 891 992 461 379 Net periodic benefit cost $ 1,958 $ 2,290 $ 96 $ 2,065 Pension Plan Postretirement Benefit Plan Six Months Ended June 30, 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 3,427 $ 3,246 $ 1,010 $ 1,864 Interest cost 3,530 3,326 964 1,508 Expected return on plan assets (4,824 ) (3,976 ) — — Amortization of prior service credit — — (2,704 ) — Amortization of net loss 1,782 1,984 922 758 Net periodic benefit cost $ 3,915 $ 4,580 $ 192 $ 4,130

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2017
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 Six Months Ended June 30, 2017 From Inception to June 30, 2017 Beginning balance 1,248,651 1,900,000 Additional shares authorized — 1,500,000 Number of awards granted (254,620 ) (2,867,186 ) Number of awards forfeited or expired 3,228 464,445 Ending balance 997,259 997,259 Number of option awards exercised 74,466 1,023,534 Number of unrestricted stock awards granted 725 8,050 Number of restricted stock awards vested — 36,970 The activity in the Director Plan is displayed in the following table: Authorized Shares Available for Future Award Grants Six Months Ended June 30, 2017 From Inception to June 30, 2017 Beginning balance 74,771 300,000 Number of awards granted (12,958 ) (262,190 ) Number of awards forfeited or expired — 24,003 Ending balance 61,813 61,813 Number of option awards exercised 6,727 59,200 Number of restricted stock awards vested 22,716 54,272
Remaining Stock-Based Compensation Expense	We expect this compensation to be recognized over the remainder of 2017 and subsequent years according to the table below, 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. 2017 $ 2,371 2018 3,981 2019 2,718 2020 1,111 2021 393 2022 40 Total $ 10,614

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information	We have reconciled the amounts in the following table for the three-month periods ended June 30, 2017 and 2016 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 June 30, 2017 Net premiums earned $ 245,222 $ 14,341 $ 259,563 Investment income, net of investment expenses 12,208 12,426 24,634 Net realized investment gains 1,081 1,599 2,680 Other income — 126 126 Total reportable segment $ 258,511 $ 28,492 $ 287,003 Intersegment eliminations (24 ) — (24 ) Total revenues $ 258,487 $ 28,492 $ 286,979 Net income $ 109 $ 2,849 $ 2,958 Assets $ 2,595,147 $ 1,602,265 $ 4,197,412 Invested assets $ 1,836,736 $ 1,492,192 $ 3,328,928 As of and for the Three Months Ended June 30, 2016 Net premiums earned $ 232,282 $ 21,205 $ 253,487 Investment income, net of investment expenses 11,655 12,889 24,544 Net realized investment gains 966 630 1,596 Other income — 183 183 Total reportable segment $ 244,903 $ 34,907 $ 279,810 Intersegment eliminations (37 ) — (37 ) Total revenues $ 244,866 $ 34,907 $ 279,773 Net income (loss) $ 3,434 $ (320 ) $ 3,114 Assets $ 2,459,526 $ 1,646,312 $ 4,105,838 Invested assets $ 1,723,641 $ 1,547,765 $ 3,271,406 We have reconciled the amounts in the following table for the six-month periods ended June 30, 2017 and 2016 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 Six Months Ended June 30, 2017 Net premiums earned $ 481,666 $ 31,769 $ 513,435 Investment income, net of investment expenses 24,813 24,876 49,689 Net realized investment gains 3,330 3,304 6,634 Other income — 324 324 Total reportable segment $ 509,809 $ 60,273 $ 570,082 Intersegment eliminations (44 ) — (44 ) Total revenues $ 509,765 $ 60,273 $ 570,038 Net income $ 18,693 $ 4,201 $ 22,894 Assets $ 2,595,147 $ 1,602,265 $ 4,197,412 Invested assets $ 1,836,736 $ 1,492,192 $ 3,328,928 As of and for the Six Months Ended June 30, 2016 Net premiums earned $ 452,507 $ 42,278 $ 494,785 Investment income, net of investment expenses 21,064 25,741 46,805 Net realized investment gains 2,703 948 3,651 Other income — 291 291 Total reportable segment $ 476,274 $ 69,258 $ 545,532 Intersegment eliminations (74 ) — (74 ) Total revenues $ 476,200 $ 69,258 $ 545,458 Net income $ 25,454 $ 87 $ 25,541 Assets $ 2,459,526 $ 1,646,312 $ 4,105,838 Invested assets $ 1,723,641 $ 1,547,765 $ 3,271,406

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and 2016 : Three Months Ended June 30, (In Thousands, Except Share Data) 2017 2016 Basic Diluted Basic Diluted Net income $ 2,958 $ 2,958 $ 3,114 $ 3,114 Weighted-average common shares outstanding 25,133,035 25,133,035 25,366,283 25,366,283 Add dilutive effect of restricted stock unit awards — 248,717 — 155,270 Add dilutive effect of stock options — 242,934 — 273,923 Weighted-average common shares 25,133,035 25,624,686 25,366,283 25,795,476 Earnings per common share $ 0.12 $ 0.12 $ 0.12 $ 0.12 Awards excluded from diluted earnings per share calculation (1) — — — — (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 six-month periods ended June 30, 2017 and 2016 : Six Months Ended June 30, (In Thousands, Except Share Data) 2017 2016 Basic Diluted Basic Diluted Net income $ 22,894 $ 22,894 $ 25,541 $ 25,541 Weighted-average common shares outstanding 25,288,068 25,288,068 25,288,086 25,288,086 Add dilutive effect of restricted stock unit awards — 248,717 — 155,270 Add dilutive effect of stock options — 215,740 — 186,221 Weighted-average common shares 25,288,068 25,752,525 25,288,086 25,629,577 Earnings per common share $ 0.91 $ 0.89 $ 1.01 $ 1.00 Awards excluded from diluted earnings per share calculation (1) — — — — (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 Comprehensi28

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of March 31, 2017 $ 141,407 $ (23,959 ) $ 117,448 Change in accumulated other comprehensive income before reclassifications 19,924 — 19,924 Reclassification adjustments from accumulated other comprehensive income (loss) (1,283 ) 879 (404 ) Balance as of June 30, 2017 $ 160,048 $ (23,080 ) $ 136,968 (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 six-month period ended June 30, 2017 : Liability for Net unrealized underfunded appreciation employee on investments benefit costs (1) Total Balance as of January 1, 2017 $ 133,892 $ (24,837 ) $ 109,055 Change in accumulated other comprehensive income before reclassifications 29,652 — 29,652 Reclassification adjustments from accumulated other comprehensive income (loss) (3,496 ) 1,757 (1,739 ) Balance as of June 30, 2017 $ 160,048 $ (23,080 ) $ 136,968 (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 Basi29

Nature of Operations and Basis of Presentation (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)state	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)statesegment	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments | segment			2
Segment Reporting Information [Line Items]
Payment for income taxes			$ 7,628,000	$ 24,017,000
Federal tax refund received			10,000,000	0
Interest payments			0	0
Decrease in DAC asset related to assumed realization of unrealized gains (losses)	$ 10,166,000		10,166,000		$ 6,413,000
Federal income tax expense	2,903,000	$ 2,250,000	$ (2,250,000)	$ (4,097,000)
Federal statutory rate			35.00%	35.00%
Liability for unrecognized tax benefits	0		$ 0		$ 0
Excess tax benefit	$ 354,000		$ 484,000
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 Basi30

Nature of Operations and Basis of Presentation (Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	$ 164,112
Underwriting costs deferred	112,380
Amortization of deferred policy acquisition costs	(105,227)
Ending unamortized deferred policy acquisition costs	171,265
Impact of unrealized gains and losses on available-for-sale securities	(3,753)	$ (20,220)
Recorded asset at end of period	167,512
Property and Casualty Insurance
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	93,362
Underwriting costs deferred	109,900
Amortization of deferred policy acquisition costs	(101,859)
Ending unamortized deferred policy acquisition costs	101,403
Impact of unrealized gains and losses on available-for-sale securities	0
Recorded asset at end of period	101,403
Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	70,750
Underwriting costs deferred	2,480
Amortization of deferred policy acquisition costs	(3,368)
Ending unamortized deferred policy acquisition costs	69,862
Impact of unrealized gains and losses on available-for-sale securities	(3,753)
Recorded asset at end of period	$ 66,109

Summary of Investments (Fair Va

Summary of Investments (Fair Value of Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
HELD-TO-MATURITY
Amortized Cost	$ 192	$ 198
Fair Value	192	199
AVAILABLE-FOR-SALE
Amortized Cost	2,974,859	2,956,009
Gross Unrealized Appreciation	275,588	247,298
Gross Unrealized Depreciation	19,062	34,765
Fair Value	3,231,385	3,168,542
Fixed Maturities
HELD-TO-MATURITY
Amortized Cost	192	198
Gross Unrealized Appreciation	0	1
Gross Unrealized Depreciation	0	0
Fair Value	192	199
AVAILABLE-FOR-SALE
Amortized Cost	2,912,326	2,887,505
Gross Unrealized Appreciation	61,097	44,840
Gross Unrealized Depreciation	18,344	34,219
Fair Value	2,955,079	2,898,126
Corporate bonds | Energy
AVAILABLE-FOR-SALE
Amortized Cost	99,416	107,084
Gross Unrealized Appreciation	2,249	2,195
Gross Unrealized Depreciation	200	419
Fair Value	101,465	108,860
Corporate bonds | Industrials
AVAILABLE-FOR-SALE
Amortized Cost	214,919	225,526
Gross Unrealized Appreciation	5,726	5,359
Gross Unrealized Depreciation	219	982
Fair Value	220,426	229,903
Corporate bonds | Consumer goods and services
AVAILABLE-FOR-SALE
Amortized Cost	179,992	178,135
Gross Unrealized Appreciation	4,927	3,847
Gross Unrealized Depreciation	157	295
Fair Value	184,762	181,687
Corporate bonds | Health care
AVAILABLE-FOR-SALE
Amortized Cost	75,863	81,211
Gross Unrealized Appreciation	2,469	2,063
Gross Unrealized Depreciation	0	151
Fair Value	78,332	83,123
Corporate bonds | Technology, media and telecommunications
AVAILABLE-FOR-SALE
Amortized Cost	143,209	143,402
Gross Unrealized Appreciation	3,224	2,029
Gross Unrealized Depreciation	175	819
Fair Value	146,258	144,612
Corporate bonds | Financial services
HELD-TO-MATURITY
Amortized Cost	150	150
Gross Unrealized Appreciation	0	0
Gross Unrealized Depreciation	0	0
Fair Value	150	150
AVAILABLE-FOR-SALE
Amortized Cost	261,314	269,981
Gross Unrealized Appreciation	6,763	5,328
Gross Unrealized Depreciation	526	1,358
Fair Value	267,551	273,951
Mortgage-backed securities
HELD-TO-MATURITY
Amortized Cost	42	48
Gross Unrealized Appreciation	0	1
Gross Unrealized Depreciation	0	0
Fair Value	42	49
AVAILABLE-FOR-SALE
Amortized Cost	15,515	17,288
Gross Unrealized Appreciation	178	201
Gross Unrealized Depreciation	195	241
Fair Value	15,498	17,248
U.S. Treasury
AVAILABLE-FOR-SALE
Amortized Cost	22,068	23,216
Gross Unrealized Appreciation	56	87
Gross Unrealized Depreciation	80	108
Fair Value	22,044	23,195
U.S. government agency
AVAILABLE-FOR-SALE
Amortized Cost	79,643	76,692
Gross Unrealized Appreciation	1,574	1,445
Gross Unrealized Depreciation	424	540
Fair Value	80,793	77,597
States, municipalities and political subdivisions | General obligations: | Midwest
AVAILABLE-FOR-SALE
Amortized Cost	128,921	143,747
Gross Unrealized Appreciation	2,588	1,808
Gross Unrealized Depreciation	555	1,412
Fair Value	130,954	144,143
States, municipalities and political subdivisions | General obligations: | Northeast
AVAILABLE-FOR-SALE
Amortized Cost	54,322	57,731
Gross Unrealized Appreciation	1,348	909
Gross Unrealized Depreciation	91	231
Fair Value	55,579	58,409
States, municipalities and political subdivisions | General obligations: | South
AVAILABLE-FOR-SALE
Amortized Cost	141,845	129,475
Gross Unrealized Appreciation	2,496	1,249
Gross Unrealized Depreciation	1,350	2,355
Fair Value	142,991	128,369
States, municipalities and political subdivisions | General obligations: | West
AVAILABLE-FOR-SALE
Amortized Cost	120,651	114,524
Gross Unrealized Appreciation	2,468	1,380
Gross Unrealized Depreciation	1,165	2,173
Fair Value	121,954	113,731
States, municipalities and political subdivisions | Special revenue: | Midwest
AVAILABLE-FOR-SALE
Amortized Cost	163,411	167,430
Gross Unrealized Appreciation	3,579	2,313
Gross Unrealized Depreciation	678	1,433
Fair Value	166,312	168,310
States, municipalities and political subdivisions | Special revenue: | Northeast
AVAILABLE-FOR-SALE
Amortized Cost	80,282	70,202
Gross Unrealized Appreciation	926	487
Gross Unrealized Depreciation	1,229	2,624
Fair Value	79,979	68,065
States, municipalities and political subdivisions | Special revenue: | South
AVAILABLE-FOR-SALE
Amortized Cost	258,666	244,225
Gross Unrealized Appreciation	3,871	1,753
Gross Unrealized Depreciation	3,547	6,791
Fair Value	258,990	239,187
States, municipalities and political subdivisions | Special revenue: | West
AVAILABLE-FOR-SALE
Amortized Cost	152,224	134,287
Gross Unrealized Appreciation	2,614	1,509
Gross Unrealized Depreciation	2,377	4,052
Fair Value	152,461	131,744
Foreign bonds
AVAILABLE-FOR-SALE
Amortized Cost	55,503	62,995
Gross Unrealized Appreciation	1,987	2,239
Gross Unrealized Depreciation	0	0
Fair Value	57,490	65,234
Public utilities
AVAILABLE-FOR-SALE
Amortized Cost	207,437	212,360
Gross Unrealized Appreciation	4,474	3,761
Gross Unrealized Depreciation	240	447
Fair Value	211,671	215,674
Government national mortgage association
AVAILABLE-FOR-SALE
Amortized Cost	155,129	145,947
Gross Unrealized Appreciation	2,228	1,279
Gross Unrealized Depreciation	1,490	2,766
Fair Value	155,867	144,460
Federal home loan mortgage corporation
AVAILABLE-FOR-SALE
Amortized Cost	194,556	176,226
Gross Unrealized Appreciation	2,566	1,638
Gross Unrealized Depreciation	2,894	3,406
Fair Value	194,228	174,458
Federal national mortgage association
AVAILABLE-FOR-SALE
Amortized Cost	103,061	101,414
Gross Unrealized Appreciation	2,367	1,816
Gross Unrealized Depreciation	752	1,334
Fair Value	104,676	101,896
Asset-backed securities
AVAILABLE-FOR-SALE
Amortized Cost	4,379	4,407
Gross Unrealized Appreciation	419	145
Gross Unrealized Depreciation	0	282
Fair Value	4,798	4,270
Equity securities:
AVAILABLE-FOR-SALE
Amortized Cost	62,533	68,504
Gross Unrealized Appreciation	214,491	202,458
Gross Unrealized Depreciation	718	546
Fair Value	276,306	270,416
Common stocks | Energy
AVAILABLE-FOR-SALE
Amortized Cost	6,514	6,514
Gross Unrealized Appreciation	7,133	8,555
Gross Unrealized Depreciation	121	22
Fair Value	13,526	15,047
Common stocks | Industrials
AVAILABLE-FOR-SALE
Amortized Cost	13,116	13,252
Gross Unrealized Appreciation	44,356	38,715
Gross Unrealized Depreciation	181	173
Fair Value	57,291	51,794
Common stocks | Consumer goods and services
AVAILABLE-FOR-SALE
Amortized Cost	10,070	10,324
Gross Unrealized Appreciation	15,379	13,851
Gross Unrealized Depreciation	118	58
Fair Value	25,331	24,117
Common stocks | Health care
AVAILABLE-FOR-SALE
Amortized Cost	7,763	7,763
Gross Unrealized Appreciation	24,958	19,657
Gross Unrealized Depreciation	0	0
Fair Value	32,721	27,420
Common stocks | Technology, media and telecommunications
AVAILABLE-FOR-SALE
Amortized Cost	6,009	5,931
Gross Unrealized Appreciation	8,837	9,476
Gross Unrealized Depreciation	107	38
Fair Value	14,739	15,369
Common stocks | Financial services
AVAILABLE-FOR-SALE
Amortized Cost	11,630	17,289
Gross Unrealized Appreciation	98,733	98,728
Gross Unrealized Depreciation	51	67
Fair Value	110,312	115,950
Common stocks | Public utilities
AVAILABLE-FOR-SALE
Amortized Cost	6,394	6,394
Gross Unrealized Appreciation	15,062	13,465
Gross Unrealized Depreciation	140	188
Fair Value	21,316	19,671
Nonredeemable preferred stocks
AVAILABLE-FOR-SALE
Amortized Cost	1,037	1,037
Gross Unrealized Appreciation	33	11
Gross Unrealized Depreciation	0	0
Fair Value	$ 1,070	$ 1,048

Summary of Investments (Maturit

Summary of Investments (Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Held-To-Maturity, Amortized Cost
Due in one year or less	$ 150
Due after one year through five years	0
Due after five years through 10 years	0
Due after 10 years	0
Amortized Cost	192	$ 198
Held-To-Maturity, Fair Value
Due in one year or less	150
Due after one year through five years	0
Due after five years through 10 years	0
Due after 10 years	0
Fair Value	192	199
Available-For-Sale, Amortized Cost
Due in one year or less	141,196
Due after one year through five years	787,370
Due after five years through 10 years	769,568
Due after 10 years	741,552
Amortized Cost	2,974,859	2,956,009
Available-For-Sale, Fair Value
Due in one year or less	142,309
Due after one year through five years	808,996
Due after five years through 10 years	788,131
Due after 10 years	740,576
Fair Value	3,231,385	3,168,542
Trading, Amortized Cost
Due in one year or less	2,958
Due after one year through five years	7,532
Due after five years through 10 years	1,302
Due after 10 years	2,153
Amortized Cost	13,945	13,054
Trading, Fair Value
Due in one year or less	3,300
Due after one year through five years	8,733
Due after five years through 10 years	1,379
Due after 10 years	2,416
Fair Value	15,828	14,390
Fixed Maturities
Held-To-Maturity, Amortized Cost
Amortized Cost	192	198
Held-To-Maturity, Fair Value
Fair Value	192	199
Available-For-Sale, Amortized Cost
Amortized Cost	2,912,326	2,887,505
Available-For-Sale, Fair Value
Fair Value	2,955,079	2,898,126
Trading, Amortized Cost
Amortized Cost	13,945
Trading, Fair Value
Fair Value	15,828
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	4,379
Amortized Cost	4,379	4,407
Available-For-Sale, Fair Value
Securities not categorized by contractual maturity	4,798
Fair Value	4,798	4,270
Mortgage-backed securities
Held-To-Maturity, Amortized Cost
Securities not categorized by contractual maturity	42
Amortized Cost	42	48
Held-To-Maturity, Fair Value
Securities not categorized by contractual maturity	42
Fair Value	42	49
Available-For-Sale, Amortized Cost
Securities not categorized by contractual maturity	15,515
Amortized Cost	15,515	17,288
Available-For-Sale, Fair Value
Securities not categorized by contractual maturity	15,498
Fair Value	15,498	$ 17,248
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	452,746
Available-For-Sale, Fair Value
Securities not categorized by contractual maturity	$ 454,771

Summary of Investments (Net Rea

Summary of Investments (Net Realized Investment Gains and Losses and Proceeds) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	$ 2,680	$ 1,596	$ 6,634	$ 3,651
Available-for-sale Securities [Abstract]
Proceeds from sales	0	1,074	5,059	3,042
Gross realized gains	0	54	2,300	975
Gross realized losses	0	0	(78)	0
Fixed maturities: | Available-for-sale
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	676	846	2,671	1,362
Fixed maturities: | Change in fair value
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	176	98	547	371
Fixed maturities: | Sales
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	(11)	461	46	461
Equity securities: | Available-for-sale
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	1,299	0	2,709	984
Equity securities: | Change in fair value
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	245	237	356	330
Equity securities: | Sales
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	6	(26)	16	(26)
Short-term investments
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	0	(43)	0	0
Cash equivalents
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	0	23	0	169
Real estate
Gain (Loss) on Investments [Line Items]
Total net realized investment gains	$ 289	$ 0	$ 289	$ 0

Summary of Investments (Narrati

Summary of Investments (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Investments [Abstract]
Sale of held-to-maturity securities	$ 0	$ 0	$ 0	$ 0
Trading securities	22,440,000		22,440,000		$ 20,034,000
Remaining potential contractual obligation	5,576,000		5,576,000
Maximum | Equity securities:
Schedule of Investments [Line Items]
Largest unrealized loss greater than 12 months on an individual security	$ 173,000		$ 173,000

Summary of Investments (Unreali

Summary of Investments (Unrealized Appreciation) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$ 32,132	$ 98,381
Available-for-sale equity securities	11,861	12,700
Deferred policy acquisition costs	(3,753)	(20,220)
Income tax effect	(14,084)	(31,802)
Total change in net unrealized investment appreciation, net of tax	$ 26,156	$ 59,059

Summary of Investments (Investm

Summary of Investments (Investments in Unrealized Loss Position) (Details) $ in Thousands	Jun. 30, 2017USD ($)issue	Dec. 31, 2016USD ($)issue
Number of Issues
Less than 12 months | issue	255	567
12 months or longer | issue	48	55
Fair Value
Less than 12 months	$ 674,868	$ 1,060,938
12 months or longer	82,999	53,798
Total	757,867	1,114,736
Gross Unrealized Depreciation
Less than 12 months	15,298	32,167
12 months or longer	3,764	2,598
Total	$ 19,062	$ 34,765
U.S. Treasury
Number of Issues
Less than 12 months | issue	4	9
12 months or longer | issue	2	0
Fair Value
Less than 12 months	$ 10,159	$ 10,800
12 months or longer	1,604	0
Total	11,763	10,800
Gross Unrealized Depreciation
Less than 12 months	78	108
12 months or longer	2	0
Total	$ 80	$ 108
U.S. government agency
Number of Issues
Less than 12 months | issue	8	10
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 33,669	$ 36,593
12 months or longer	0	0
Total	33,669	36,593
Gross Unrealized Depreciation
Less than 12 months	424	540
12 months or longer	0	0
Total	$ 424	$ 540
Fixed Maturities
Number of Issues
Less than 12 months | issue	248	554
12 months or longer | issue	33	33
Fair Value
Less than 12 months	$ 673,697	$ 1,060,577
12 months or longer	82,045	53,078
Total	755,742	1,113,655
Gross Unrealized Depreciation
Less than 12 months	15,144	32,104
12 months or longer	3,200	2,115
Total	$ 18,344	$ 34,219
States, municipalities and political subdivisions | General obligations: | Midwest
Number of Issues
Less than 12 months | issue	5	27
12 months or longer | issue	1	0
Fair Value
Less than 12 months	$ 17,233	$ 40,545
12 months or longer	5,254	0
Total	22,487	40,545
Gross Unrealized Depreciation
Less than 12 months	381	1,412
12 months or longer	174	0
Total	$ 555	$ 1,412
States, municipalities and political subdivisions | General obligations: | Northeast
Number of Issues
Less than 12 months | issue	1	9
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 3,574	$ 9,874
12 months or longer	0	0
Total	3,574	9,874
Gross Unrealized Depreciation
Less than 12 months	91	231
12 months or longer	0	0
Total	$ 91	$ 231
States, municipalities and political subdivisions | General obligations: | South
Number of Issues
Less than 12 months | issue	15	37
12 months or longer | issue	2	0
Fair Value
Less than 12 months	$ 36,447	$ 53,699
12 months or longer	9,271	0
Total	45,718	53,699
Gross Unrealized Depreciation
Less than 12 months	839	2,355
12 months or longer	511	0
Total	$ 1,350	$ 2,355
States, municipalities and political subdivisions | General obligations: | West
Number of Issues
Less than 12 months | issue	9	30
12 months or longer | issue	1	0
Fair Value
Less than 12 months	$ 29,069	$ 55,265
12 months or longer	2,029	0
Total	31,098	55,265
Gross Unrealized Depreciation
Less than 12 months	1,061	2,173
12 months or longer	104	0
Total	$ 1,165	$ 2,173
States, municipalities and political subdivisions | Special revenue: | Midwest
Number of Issues
Less than 12 months | issue	12	41
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 28,702	$ 62,937
12 months or longer	0	0
Total	28,702	62,937
Gross Unrealized Depreciation
Less than 12 months	678	1,433
12 months or longer	0	0
Total	$ 678	$ 1,433
States, municipalities and political subdivisions | Special revenue: | Northeast
Number of Issues
Less than 12 months | issue	16	22
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 48,096	$ 54,993
12 months or longer	0	0
Total	48,096	54,993
Gross Unrealized Depreciation
Less than 12 months	1,229	2,624
12 months or longer	0	0
Total	$ 1,229	$ 2,624
States, municipalities and political subdivisions | Special revenue: | South
Number of Issues
Less than 12 months | issue	33	79
12 months or longer | issue	4	0
Fair Value
Less than 12 months	$ 82,121	$ 152,979
12 months or longer	15,640	0
Total	97,761	152,979
Gross Unrealized Depreciation
Less than 12 months	2,461	6,791
12 months or longer	1,086	0
Total	$ 3,547	$ 6,791
States, municipalities and political subdivisions | Special revenue: | West
Number of Issues
Less than 12 months | issue	27	44
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 69,324	$ 81,676
12 months or longer	0	0
Total	69,324	81,676
Gross Unrealized Depreciation
Less than 12 months	2,377	4,052
12 months or longer	0	0
Total	$ 2,377	$ 4,052
Public utilities
Number of Issues
Less than 12 months | issue	8	20
12 months or longer | issue	1	2
Fair Value
Less than 12 months	$ 16,557	$ 38,511
12 months or longer	92	2,122
Total	16,649	40,633
Gross Unrealized Depreciation
Less than 12 months	235	423
12 months or longer	5	24
Total	$ 240	$ 447
Corporate bonds | Energy
Number of Issues
Less than 12 months | issue	5	8
12 months or longer | issue	0	3
Fair Value
Less than 12 months	$ 12,755	$ 15,938
12 months or longer	0	8,232
Total	12,755	24,170
Gross Unrealized Depreciation
Less than 12 months	200	313
12 months or longer	0	106
Total	$ 200	$ 419
Corporate bonds | Industrials
Number of Issues
Less than 12 months | issue	5	24
12 months or longer | issue	2	3
Fair Value
Less than 12 months	$ 9,004	$ 42,854
12 months or longer	4,803	5,641
Total	13,807	48,495
Gross Unrealized Depreciation
Less than 12 months	75	596
12 months or longer	144	386
Total	$ 219	$ 982
Corporate bonds | Consumer goods and services
Number of Issues
Less than 12 months | issue	8	11
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 13,832	$ 21,059
12 months or longer	0	0
Total	13,832	21,059
Gross Unrealized Depreciation
Less than 12 months	157	295
12 months or longer	0	0
Total	$ 157	$ 295
Corporate bonds | Technology, media and telecommunications
Number of Issues
Less than 12 months | issue	7	16
12 months or longer | issue	2	3
Fair Value
Less than 12 months	$ 20,121	$ 41,230
12 months or longer	10,584	10,241
Total	30,705	51,471
Gross Unrealized Depreciation
Less than 12 months	62	516
12 months or longer	113	303
Total	$ 175	$ 819
Corporate bonds | Health care
Number of Issues
Less than 12 months | issue		9
12 months or longer | issue		0
Fair Value
Less than 12 months		$ 20,918
12 months or longer		0
Total		20,918
Gross Unrealized Depreciation
Less than 12 months		151
12 months or longer		0
Total		$ 151
Corporate bonds | Financial services
Number of Issues
Less than 12 months | issue	15	37
12 months or longer | issue	0	0
Fair Value
Less than 12 months	$ 36,947	$ 75,286
12 months or longer	0	0
Total	36,947	75,286
Gross Unrealized Depreciation
Less than 12 months	526	1,358
12 months or longer	0	0
Total	$ 526	$ 1,358
Mortgage-backed securities
Number of Issues
Less than 12 months | issue	14	16
12 months or longer | issue	2	5
Fair Value
Less than 12 months	$ 8,927	$ 9,611
12 months or longer	996	1,198
Total	9,923	10,809
Gross Unrealized Depreciation
Less than 12 months	152	187
12 months or longer	43	54
Total	$ 195	$ 241
Government national mortgage association
Number of Issues
Less than 12 months | issue	18	36
12 months or longer | issue	8	9
Fair Value
Less than 12 months	$ 56,024	$ 82,430
12 months or longer	18,631	13,603
Total	74,655	96,033
Gross Unrealized Depreciation
Less than 12 months	945	2,261
12 months or longer	545	505
Total	$ 1,490	$ 2,766
Federal home loan mortgage corporation
Number of Issues
Less than 12 months | issue	26	41
12 months or longer | issue	3	3
Fair Value
Less than 12 months	$ 107,586	$ 105,775
12 months or longer	4,814	5,141
Total	112,400	110,916
Gross Unrealized Depreciation
Less than 12 months	2,693	3,165
12 months or longer	201	241
Total	$ 2,894	$ 3,406
Federal national mortgage association
Number of Issues
Less than 12 months | issue	12	27
12 months or longer | issue	5	4
Fair Value
Less than 12 months	$ 33,550	$ 46,633
12 months or longer	8,327	4,341
Total	41,877	50,974
Gross Unrealized Depreciation
Less than 12 months	480	1,091
12 months or longer	272	243
Total	$ 752	$ 1,334
Asset-backed Securities [Member]
Number of Issues
Less than 12 months | issue		1
12 months or longer | issue		1
Fair Value
Less than 12 months		$ 971
12 months or longer		2,559
Total		3,530
Gross Unrealized Depreciation
Less than 12 months		29
12 months or longer		253
Total		$ 282
Common stocks | Energy
Number of Issues
Less than 12 months | issue	2	0
12 months or longer | issue	1	1
Fair Value
Less than 12 months	$ 553	$ 0
12 months or longer	160	163
Total	713	163
Gross Unrealized Depreciation
Less than 12 months	95	0
12 months or longer	26	22
Total	$ 121	$ 22
Common stocks | Industrials
Number of Issues
Less than 12 months | issue	0	0
12 months or longer | issue	6	6
Fair Value
Less than 12 months	$ 0	$ 0
12 months or longer	231	239
Total	231	239
Gross Unrealized Depreciation
Less than 12 months	0	0
12 months or longer	181	173
Total	$ 181	$ 173
Common stocks | Consumer goods and services
Number of Issues
Less than 12 months | issue	1	3
12 months or longer | issue	4	2
Fair Value
Less than 12 months	$ 22	$ 282
12 months or longer	215	15
Total	237	297
Gross Unrealized Depreciation
Less than 12 months	1	55
12 months or longer	117	3
Total	$ 118	$ 58
Common stocks | Technology, media and telecommunications
Number of Issues
Less than 12 months | issue	3	7
12 months or longer | issue	1	8
Fair Value
Less than 12 months	$ 544	$ 26
12 months or longer	14	33
Total	558	59
Gross Unrealized Depreciation
Less than 12 months	55	5
12 months or longer	52	33
Total	$ 107	$ 38
Common stocks | Financial services
Number of Issues
Less than 12 months | issue	1	3
12 months or longer | issue	2	2
Fair Value
Less than 12 months	$ 52	$ 53
12 months or longer	166	150
Total	218	203
Gross Unrealized Depreciation
Less than 12 months	3	3
12 months or longer	48	64
Total	$ 51	$ 67
Common stocks | Public utilities
Number of Issues
Less than 12 months | issue	0	0
12 months or longer | issue	1	3
Fair Value
Less than 12 months	$ 0	$ 0
12 months or longer	168	120
Total	168	120
Gross Unrealized Depreciation
Less than 12 months	0	0
12 months or longer	140	188
Total	$ 140	$ 188
Equity securities:
Number of Issues
Less than 12 months | issue	7	13
12 months or longer | issue	15	22
Fair Value
Less than 12 months	$ 1,171	$ 361
12 months or longer	954	720
Total	2,125	1,081
Gross Unrealized Depreciation
Less than 12 months	154	63
12 months or longer	564	483
Total	$ 718	$ 546

Fair Value of Financial Instr37

Fair Value of Financial Instruments (Narrative) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Rabbi Trust | Other Assets | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash surrender value	$ 3,244

Fair Value of Financial Instr38

Fair Value of Financial Instruments (Carrying Value and Estimated Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Investments
Held-to-maturity securities	$ 192	$ 199
Available-for-sale securities	3,231,385	3,168,542
Trading securities	22,440	20,034
Fair Value
Investments
Mortgage loans	3,765	3,895
Policy loans	5,499	5,366
Other long-term investments	65,664	67,639
Short-term investments	175	175
Cash and cash equivalents	130,421	110,853
Corporate-owned life insurance	3,244	2,592
Policy reserves
Annuity (accumulations)	629,169	646,764
Annuity (benefit payments)	143,925	144,283
Fair Value | Fixed maturities:
Investments
Held-to-maturity securities	192	199
Available-for-sale securities	2,955,079	2,898,126
Trading securities	15,828	14,390
Fair Value | Equity securities:
Investments
Available-for-sale securities	276,306	270,416
Trading securities	6,612	5,644
Carrying Value
Investments
Mortgage loans	3,573	3,706
Policy loans	5,499	5,366
Other long-term investments	65,664	67,639
Short-term investments	175	175
Cash and cash equivalents	130,421	110,853
Corporate-owned life insurance	3,244	2,592
Policy reserves
Annuity (accumulations)	631,070	666,711
Annuity (benefit payments)	94,323	95,129
Carrying Value | Fixed maturities:
Investments
Held-to-maturity securities	192	198
Available-for-sale securities	2,955,079	2,898,126
Trading securities	15,828	14,390
Carrying Value | Equity securities:
Investments
Available-for-sale securities	276,306	270,416
Trading securities	$ 6,612	$ 5,644

Fair Value of Financial Instr39

Fair Value of Financial Instruments (Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 3,231,385	$ 3,168,542
Trading securities	22,440	20,034
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,044	23,195
U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	80,793	77,597
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	130,954	144,143
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	55,579	58,409
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	142,991	128,369
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	121,954	113,731
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	166,312	168,310
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	79,979	68,065
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	258,990	239,187
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	152,461	131,744
Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,490	65,234
Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	211,671	215,674
Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	101,465	108,860
Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	220,426	229,903
Corporate bonds | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	184,762	181,687
Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	78,332	83,123
Corporate bonds | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	146,258	144,612
Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	267,551	273,951
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,498	17,248
Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	155,867	144,460
Federal home loan mortgage corporation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	194,228	174,458
Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	104,676	101,896
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,798	4,270
Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,955,079	2,898,126
Common stocks | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	13,526	15,047
Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,291	51,794
Common stocks | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	25,331	24,117
Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	32,721	27,420
Common stocks | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,739	15,369
Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	110,312	115,950
Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	21,316	19,671
Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,070	1,048
Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	276,306	270,416
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,231,385	3,168,542
Trading securities	22,440	20,034
Short-Term Investments	175	175
Money Market Accounts	14,641	16,802
Corporate-Owned Life Insurance	3,244	2,592
Total Assets Measured at Fair Value	3,271,885	3,208,145
Recurring | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,044	23,195
Recurring | U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	80,793	77,597
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	130,954	144,143
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	55,579	58,409
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	142,991	128,369
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	121,954	113,731
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	166,312	168,310
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	79,979	68,065
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	258,990	239,187
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	152,461	131,744
Recurring | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,490	65,234
Recurring | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	211,671	215,674
Recurring | Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	101,465	108,860
Recurring | Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	220,426	229,903
Trading securities	3,724	3,919
Recurring | Corporate bonds | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	184,762	181,687
Trading securities	293	127
Recurring | Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	78,332	83,123
Trading securities	3,708	3,410
Recurring | Corporate bonds | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	146,258	144,612
Trading securities	1,200	787
Recurring | Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	267,551	273,951
Trading securities	4,262	4,842
Recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,498	17,248
Recurring | Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	155,867	144,460
Recurring | Federal home loan mortgage corporation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	194,228	174,458
Recurring | Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	104,676	101,896
Recurring | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,798	4,270
Recurring | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,955,079	2,898,126
Recurring | Common stocks | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	13,526	15,047
Recurring | Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,291	51,794
Recurring | Common stocks | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	25,331	24,117
Recurring | Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	32,721	27,420
Recurring | Common stocks | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,739	15,369
Recurring | Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	110,312	115,950
Recurring | Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	21,316	19,671
Recurring | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,070	1,048
Trading securities	2,828	2,121
Recurring | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	276,306	270,416
Recurring | Equity securities: | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	216	286
Recurring | Equity securities: | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	947	877
Recurring | Equity securities: | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,200	1,202
Recurring | Equity securities: | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	370	339
Recurring | Equity securities: | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	232	206
Recurring | Equity securities: | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	819	613
Recurring | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,641	1,305
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	275,711	265,829
Trading securities	9,253	6,949
Short-Term Investments	175	175
Money Market Accounts	14,641	16,802
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	299,780	289,755
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
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	13,526	15,047
Recurring | Level 1 | Common stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,291	51,794
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	25,331	24,117
Recurring | Level 1 | Common stocks | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	32,721	27,420
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	14,739	15,369
Recurring | Level 1 | Common stocks | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	110,312	111,958
Recurring | Level 1 | Common stocks | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	21,316	19,671
Recurring | Level 1 | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	475	453
Trading securities	2,828	2,121
Recurring | Level 1 | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	275,711	265,829
Recurring | Level 1 | Equity securities: | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	216	286
Recurring | Level 1 | Equity securities: | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	947	877
Recurring | Level 1 | Equity securities: | Consumer goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,200	1,202
Recurring | Level 1 | Equity securities: | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	370	339
Recurring | Level 1 | Equity securities: | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	232	206
Recurring | Level 1 | Equity securities: | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	819	613
Recurring | Level 1 | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,641	1,305
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,945,324	2,887,615
Trading securities	13,187	13,085
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	3,244	2,592
Total Assets Measured at Fair Value	2,961,755	2,903,292
Recurring | Level 2 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,044	23,195
Recurring | Level 2 | U.S. government agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	80,793	77,597
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	130,954	144,143
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	55,579	58,409
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	142,991	128,369
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	121,954	113,731
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	166,235	168,142
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	79,979	68,065
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	258,990	239,187
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	152,461	131,744
Recurring | Level 2 | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,490	65,234
Recurring | Level 2 | Public utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	211,671	215,674
Recurring | Level 2 | Corporate bonds | Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	101,465	108,860
Recurring | Level 2 | Corporate bonds | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	220,426	229,903
Trading securities	3,724	3,919
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	184,034	180,590
Trading securities	293	127
Recurring | Level 2 | Corporate bonds | Health care
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	78,332	83,123
Trading securities	3,708	3,410
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	146,258	144,612
Trading securities	1,200	787
Recurring | Level 2 | Corporate bonds | Financial services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	259,223	265,154
Trading securities	4,262	4,842
Recurring | Level 2 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,498	17,248
Recurring | Level 2 | Government national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	155,867	144,460
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	194,228	174,458
Recurring | Level 2 | Federal national mortgage association
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	104,676	101,896
Recurring | Level 2 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,176	3,821
Recurring | Level 2 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,945,324	2,887,615
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	0
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	0
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	0
Recurring | Level 2 | Redeemable preferred stocks
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	10,350	15,098
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	10,350	15,098
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	77	168
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	728	1,097
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	8,328	8,797
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	622	449
Recurring | Level 3 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	9,755	10,511
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	0	3,992
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	595	595
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	595	4,587
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	0
Recurring | Level 3 | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 0	$ 0

Fair Value of Financial Instr40

Fair Value of Financial Instruments (Level 3 Securities) (Details) - Recurring - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 14,836	$ 15,098
Net unrealized gains (losses)	228	168
Purchases		145
Disposals	(4,714)	(5,061)
Ending Balance	10,350	10,350
States, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	168	168
Net unrealized gains (losses)	(6)	(6)
Purchases		0
Disposals	(85)	(85)
Ending Balance	77	77
Corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	9,494	9,894
Net unrealized gains (losses)	68	1
Purchases		0
Disposals	(506)	(839)
Ending Balance	9,056	9,056
Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	456	449
Net unrealized gains (losses)	166	173
Purchases		0
Disposals	0	0
Ending Balance	622	622
Equities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	4,718	4,587
Net unrealized gains (losses)	0	0
Purchases		145
Disposals	(4,123)	(4,137)
Ending Balance	$ 595	$ 595

Reserves for Losses and Loss 41

Reserves for Losses and Loss Settlement Expenses (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Insurance Loss Reserves [Abstract]
Gross liability for losses and loss settlement expenses at beginning of year	$ 1,123,896	$ 1,003,895
Ceded losses and loss settlement expenses	(59,794)	(54,653)
Net liability for losses and loss settlement expenses at beginning of year	1,064,102	949,242
Losses and loss settlement expenses incurred for claims occurring during
Current year	386,352	683,662
Prior years	(41,202)	(31,229)
Total incurred	345,150	652,433
Losses and loss settlement expense payments for claims occurring during
Current year	116,808	277,053
Prior years	175,126	260,520
Total paid	291,934	537,573
Net liability for losses and loss settlement expenses at end of year	1,117,318	1,064,102
Ceded loss and loss settlement expenses	63,160	59,794
Gross liability for losses and loss settlement expenses at end of period	$ 1,180,478	$ 1,123,896

Employee Benefits (Details)

Employee Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Pension Plan
Net periodic benefit cost
Service cost	$ 1,714	$ 1,623	$ 3,427	$ 3,246
Interest cost	1,765	1,663	3,530	3,326
Expected return on plan assets	(2,412)	(1,988)	(4,824)	(3,976)
Amortization of prior service credit	0	0	0	0
Amortization of net loss	891	992	1,782	1,984
Net periodic benefit cost	1,958	2,290	3,915	4,580
Estimated 2017 pension plan contribution, disclosed in prior year 10K					$ 6,400
Contribution by employer			3,196
Postretirement Benefit Plan
Net periodic benefit cost
Service cost	505	932	1,010	1,864
Interest cost	482	754	964	1,508
Expected return on plan assets	0	0	0	0
Amortization of prior service credit	(1,352)	0	(2,704)	0
Amortization of net loss	461	379	922	758
Net periodic benefit cost	$ 96	$ 2,065	$ 192	$ 4,130

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		102 Months Ended
	May 31, 2014	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2008	Dec. 31, 2004
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 1,210	$ 889	$ 2,254	$ 1,865
Stock-based compensation expense to be recognized through results of operations		$ 10,614		$ 10,614		$ 10,614
Employee Stock Award Plan-2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (in shares)		997,259		997,259		997,259	1,248,651	1,900,000
Additional shares authorized (in shares)	1,500,000			0		1,500,000
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
Employee Stock Award Plan-2008 | Options Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period				10 years
Director Plan - 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (in shares)		61,813		61,813		61,813	74,771		300,000

Stock-Based Compensation (Activ

Stock-Based Compensation (Activity in the Stock Plan) (Details) - shares	1 Months Ended	6 Months Ended	102 Months Ended	150 Months Ended
	May 31, 2014	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2017
Employee Stock Award Plan-2008
Authorized Shares Available for Future Award Grants
Beginning balance (in shares)		1,248,651	1,900,000
Additional shares authorized (in shares)	1,500,000	0	1,500,000
Number of awards granted (in shares)		(254,620)	(2,867,186)
Number of awards forfeited or expired (in shares)		3,228	464,445
Ending balance (in shares)		997,259	997,259	997,259
Employee Stock Award Plan-2008 | Options Awards
Authorized Shares Available for Future Award Grants
Number of option awards exercised (in shares)		74,466	1,023,534
Employee Stock Award Plan-2008 | Unrestricted Stock Awards
Authorized Shares Available for Future Award Grants
Number of awards granted (in shares)		(725)	(8,050)
Employee Stock Award Plan-2008 | Restricted Stock Awards
Authorized Shares Available for Future Award Grants
Number of restricted stock awards vested (in shares)		0	36,970
Director Plan - 2005
Authorized Shares Available for Future Award Grants
Beginning balance (in shares)		74,771		300,000
Number of awards granted (in shares)		(12,958)		(262,190)
Number of awards forfeited or expired (in shares)		0		24,003
Ending balance (in shares)		61,813	61,813	61,813
Director Plan - 2005 | Options Awards
Authorized Shares Available for Future Award Grants
Number of option awards exercised (in shares)		6,727		59,200
Number of restricted stock awards vested (in shares)		22,716		54,272

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock-based Compensation Expense) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Share-based Compensation [Abstract]
2,017	$ 2,371
2,018	3,981
2,019	2,718
2,020	1,111
2,021	393
2,022	40
Total	$ 10,614

Segment Information (Details)

Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)location	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)segmentlocation	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Segment Reporting Information [Line Items]
Number of business segments | segment			2
Net premiums earned	$ 259,563	$ 253,487	$ 513,435	$ 494,785
Investment income, net of investment expenses	24,610	24,507	49,645	46,731
Net realized investment gains	2,680	1,596	6,634	3,651
Other income	126	183	324	291
Total revenues	286,979	279,773	570,038	545,458
Net income	2,958	3,114	22,894	25,541
Assets	4,197,412	4,105,838	4,197,412	4,105,838	$ 4,054,758
Invested assets	$ 3,328,928	3,271,406	$ 3,328,928	3,271,406	$ 3,265,660
Property and Casualty Insurance
Segment Reporting Information [Line Items]
Number of domestic locations | location	6		6
Total revenues	$ 258,487	244,866	$ 509,765	476,200
Net income	109	3,434	18,693	25,454
Assets	2,595,147	2,459,526	2,595,147	2,459,526
Invested assets	1,836,736	1,723,641	1,836,736	1,723,641
Life Insurance
Segment Reporting Information [Line Items]
Total revenues	28,492	34,907	60,273	69,258
Net income	2,849	(320)	4,201	87
Assets	1,602,265	1,646,312	1,602,265	1,646,312
Invested assets	1,492,192	1,547,765	1,492,192	1,547,765
Operating Segments
Segment Reporting Information [Line Items]
Net premiums earned	259,563	253,487	513,435	494,785
Investment income, net of investment expenses	24,634	24,544	49,689	46,805
Net realized investment gains	2,680	1,596	6,634	3,651
Other income	126	183	324	291
Total revenues	287,003	279,810	570,082	545,532
Operating Segments | Property and Casualty Insurance
Segment Reporting Information [Line Items]
Net premiums earned	245,222	232,282	481,666	452,507
Investment income, net of investment expenses	12,208	11,655	24,813	21,064
Net realized investment gains	1,081	966	3,330	2,703
Other income	0	0	0	0
Total revenues	258,511	244,903	509,809	476,274
Operating Segments | Life Insurance
Segment Reporting Information [Line Items]
Net premiums earned	14,341	21,205	31,769	42,278
Investment income, net of investment expenses	12,426	12,889	24,876	25,741
Net realized investment gains	1,599	630	3,304	948
Other income	126	183	324	291
Total revenues	28,492	34,907	60,273	69,258
Intersegment eliminations
Segment Reporting Information [Line Items]
Total revenues	(24)	(37)	(44)	(74)
Intersegment eliminations | Property and Casualty Insurance
Segment Reporting Information [Line Items]
Total revenues	(24)	(37)	(44)	(74)
Intersegment eliminations | Life Insurance
Segment Reporting Information [Line Items]
Total revenues	$ 0	$ 0	$ 0	$ 0

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic and Diluted Earnings per Share [Line Items]
Net income	$ 2,958	$ 3,114	$ 22,894	$ 25,541
Weighted-average common shares outstanding (in shares)	25,133,035	25,366,283	25,288,068	25,288,086
Weighted-average common shares for EPS calculation (in shares)	25,624,686	25,795,476	25,752,525	25,629,577
Basic earnings per common share (in dollars per share)	$ 0.12	$ 0.12	$ 0.91	$ 1.01
Diluted earnings per common share (in dollars per share)	$ 0.12	$ 0.12	$ 0.89	$ 1
Awards excluded from diluted earnings per share calculation (in shares)	0	0	0	0
Restricted Stock Unit Awards
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	248,717	155,270	248,717	155,270
Stock Options
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	242,934	273,923	215,740	186,221

Credit Facility (Details)

Credit Facility (Details)	Feb. 02, 2016USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)
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
Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 20,000,000
Swing Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 5,000,000

Accumulated Other Comprehensi49

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year			$ 941,884
Change in accumulated other comprehensive income before reclassifications	$ 19,924	$ 32,065	29,652	$ 60,584
Reclassification adjustments from accumulated other comprehensive income (loss)	(404)	$ 437	(1,739)	$ 258
Balance, end of period	962,588		962,588
Net unrealized appreciation on investments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year	141,407		133,892
Change in accumulated other comprehensive income before reclassifications	19,924		29,652
Reclassification adjustments from accumulated other comprehensive income (loss)	(1,283)		(3,496)
Balance, end of period	160,048		160,048
Liability for underfunded employee benefit costs
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year	(23,959)		(24,837)
Change in accumulated other comprehensive income before reclassifications	0		0
Reclassification adjustments from accumulated other comprehensive income (loss)	879		1,757
Balance, end of period	(23,080)		(23,080)
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of year	117,448		109,055
Change in accumulated other comprehensive income before reclassifications	19,924		29,652
Reclassification adjustments from accumulated other comprehensive income (loss)	(404)		(1,739)
Balance, end of period	$ 136,968		$ 136,968