INVESTMENTS

Investments of the Company’s insurance subsidiaries are subject to the insurance laws of the state of their incorporation. These laws prescribe the kind, quality and concentration of investments that may be made by insurance companies. In general, these laws permit investments, within specified limits and subject to certain qualifications, in federal, state and municipal obligations, corporate bonds, preferred and common stocks and real estate mortgages. The Company believes that it is in compliance with these laws.

The amortized cost and estimated fair value of securities available-for-sale as of December 31, 2017 and 2016 are as follows. All securities are classified as available-for-sale and are carried at fair value.



December 31, 2017	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair values
($ in thousands)	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair values
Securities available-for-sale:
Fixed maturity securities:
U.S. treasury	$	8,115	$	—	$	37	$	8,078
U.S. government-sponsored agencies	303,932		122		6,105		297,949
Obligations of states and political subdivisions	290,038		17,729		231		307,536
Commercial mortgage-backed	84,058		591		669		83,980
Residential mortgage-backed	120,554		2,479		3,234		119,799
Other asset-backed	23,934		625		445		24,114
Corporate	422,535		11,490		465		433,560
Total fixed maturity securities	1,253,166		33,036		11,186		1,275,016

Equity securities:
Common stocks:
Financial services	30,103		13,594		175		43,522
Information technology	18,308		17,504		2		35,810
Healthcare	18,877		11,876		158		30,595
Consumer staples	9,275		4,917		65		14,127
Consumer discretionary	10,935		9,640		37		20,538
Energy	12,441		5,381		917		16,905
Industrials	12,746		15,757		14		28,489
Other	11,058		5,363		—		16,421
Non-redeemable preferred stocks	20,531		1,216		39		21,708
Total equity securities	144,274		85,248		1,407		228,115
Total securities available-for-sale	$	1,397,440	$	118,284	$	12,593	$	1,503,131



December 31, 2016	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair values
($ in thousands)	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair values
Securities available-for-sale:
Fixed maturity securities:
U.S. treasury	$	7,841	$	—	$	11	$	7,830
U.S. government-sponsored agencies	249,495		311		10,609		239,197
Obligations of states and political subdivisions	319,663		17,034		940		335,757
Commercial mortgage-backed	37,964		741		1,133		37,572
Residential mortgage-backed	102,307		1,435		7,308		96,434
Other asset-backed	26,592		732		931		26,393
Corporate	445,663		12,232		1,379		456,516
Total fixed maturity securities	1,189,525		32,485		22,311		1,199,699

Equity securities:
Common stocks:
Financial services	22,922		12,410		210		35,122
Information technology	19,832		10,739		29		30,542
Healthcare	16,092		8,700		85		24,707
Consumer staples	13,438		5,787		125		19,100
Consumer discretionary	14,812		7,672		163		22,321
Energy	14,276		4,873		78		19,071
Industrials	13,005		11,258		18		24,245
Other	13,071		5,345		32		18,384
Non-redeemable preferred stocks	20,031		483		167		20,347
Total equity securities	147,479		67,267		907		213,839
Total securities available-for-sale	$	1,337,004	$	99,752	$	23,218	$	1,413,538

The following tables set forth the estimated fair values and gross unrealized losses associated with investment securities that were in an unrealized loss position as of December 31, 2017 and 2016, listed by length of time the securities were consistently in an unrealized loss position.



December 31, 2017	Less than twelve months				Twelve months or longer				Total
($ in thousands)	Fair values		Unrealized losses		Fair values		Unrealized losses		Fair values		Unrealized losses
Fixed maturity securities:
U.S. treasury	$	8,078	$	37	$	—	$	—	$	8,078	$	37
U.S. government-sponsored agencies	134,284		1,491		127,604		4,614		261,888		6,105
Obligations of states and political subdivisions	—		—		14,416		231		14,416		231
Commercial mortgage-backed	32,155		221		8,530		448		40,685		669
Residential mortgage-backed	30,003		394		22,948		2,840		52,951		3,234
Other asset-backed	—		—		13,440		445		13,440		445
Corporate	28,314		329		4,047		136		32,361		465
Total fixed maturity securities	232,834		2,472		190,985		8,714		423,819		11,186
Equity securities:
Common stocks:
Financial services	4,391		175		—		—		4,391		175
Information technology	344		2		—		—		344		2
Healthcare	2,532		158		—		—		2,532		158
Consumer staples	575		65		—		—		575		65
Consumer discretionary	992		37		—		—		992		37
Energy	3,181		917		—		—		3,181		917
Industrials	3,016		14		—		—		3,016		14
Non-redeemable preferred stocks	—		—		1,961		39		1,961		39
Total equity securities	15,031		1,368		1,961		39		16,992		1,407
Total temporarily impaired securities	$	247,865	$	3,840	$	192,946	$	8,753	$	440,811	$	12,593



December 31, 2016	Less than twelve months				Twelve months or longer				Total
($ in thousands)	Fair values		Unrealized losses		Fair values		Unrealized losses		Fair values		Unrealized losses
Fixed maturity securities:
U.S. treasury	$	7,830	$	11	$	—	$	—	$	7,830	$	11
U.S. government-sponsored agencies	202,900		10,609		—		—		202,900		10,609
Obligations of states and political subdivisions	43,777		940		—		—		43,777		940
Commercial mortgage-backed	21,695		1,133		—		—		21,695		1,133
Residential mortgage-backed	26,217		1,232		23,625		6,076		49,842		7,308
Other asset-backed	19,091		931		—		—		19,091		931
Corporate	82,657		1,273		8,625		106		91,282		1,379
Total fixed maturity securities	404,167		16,129		32,250		6,182		436,417		22,311
Equity securities:
Common stocks:
Financial services	1,462		12		908		198		2,370		210
Information technology	1,947		29		—		—		1,947		29
Healthcare	3,585		85		—		—		3,585		85
Consumer staples	2,427		125		—		—		2,427		125
Consumer discretionary	1,637		163		—		—		1,637		163
Energy	1,621		33		1,188		45		2,809		78
Industrials	779		18		—		—		779		18
Other	1,472		32		—		—		1,472		32
Non-redeemable preferred stocks	3,356		44		1,877		123		5,233		167
Total equity securities	18,286		541		3,973		366		22,259		907
Total temporarily impaired securities	$	422,453	$	16,670	$	36,223	$	6,548	$	458,676	$	23,218

All of the fixed maturity securities that are in an unrealized loss position are considered investment grade by credit rating agencies. Because management does not intend to sell these securities, does not believe it will be required to sell these securities before recovery, and believes it will collect the amounts due on these securities, it was determined that these securities were not “other-than-temporarily” impaired at December 31, 2017.

No individual equity security accounted for a material amount of unrealized losses. Because the Company has the ability and intent to hold these securities for a reasonable amount of time to allow for recovery, it was determined that these securities were not “other-than-temporarily” impaired at December 31, 2017.

All of the Company’s preferred stock holdings that are in an unrealized loss position are perpetual preferred stocks. The Company evaluates these perpetual preferred stocks with unrealized losses for “other-than-temporary” impairment similar to fixed maturity securities since they have debt-like characteristics such as periodic cash flows in the form of dividends and call features, are rated by rating agencies and are priced like other long-term callable fixed maturity securities. There was no evidence of any credit deterioration in the issuers of the preferred stocks and the Company does not intend to sell these securities before recovery, nor does it believe it will be required to sell these securities before recovery; therefore, it was determined that these securities were not “other-than-temporarily” impaired at December 31, 2017.

The amortized cost and estimated fair values of fixed maturity securities at December 31, 2017, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties.



($ in thousands)	Amortized cost		Estimated fair values
Securities available-for-sale:
Due in one year or less	$	40,543	$	41,094
Due after one year through five years	173,741		177,883
Due after five years through ten years	368,782		376,119
Due after ten years	463,572		474,251
Securities not due at a single maturity date	206,528		205,669
Totals	$	1,253,166	$	1,275,016

A summary of realized investment gains and (losses) is as follows:



	Year ended December 31,
($ in thousands)	2017			2016			2015
Fixed maturity securities available-for-sale:
Gross realized investment gains	$	545		$	2,054		$	725
Gross realized investment losses	(4,849		)	(2,829		)	(251		)

Equity securities available-for-sale:
Gross realized investment gains	19,792			15,078			12,741
Gross realized investment losses	(1,592		)	(2,675		)	(4,110		)
"Other-than-temporary" impairments	(1,088		)	(1,055		)	(1,481		)

Other long-term investments, net	(6,252		)	(6,499		)	(1,471		)
Totals	$	6,556		$	4,074		$	6,153

Gains and losses realized on the disposition of investments are included in net income. The cost of investments sold is determined on the specific identification method using the highest cost basis first. The Company did not have any outstanding cumulative credit losses on fixed maturity securities that have been recognized in earnings from “other-than-temporary” impairments during any of the reported periods. The amounts reported as “other-than-temporary” impairments on equity securities do not include any individually significant items. The net realized investment losses recognized on other long-term investments primarily represent changes in the carrying value of a limited partnership that is used solely to support an equity tail-risk hedging strategy, but for 2016 also included an "other-than-temporary" impairment loss of $209,000 on an investment that conveys investment tax credits.

A summary of net investment income is as follows:



	Year ended December 31,
($ in thousands)	2017			2016			2015
Interest on fixed maturity securities	$	39,992		$	41,499		$	42,261
Dividends on equity securities	6,032			6,922			5,617
Income on reverse repurchase agreements	306			236			117
Interest on short-term investments	273			121			2
Return on long-term investments	1,126			514			(461		)
Total investment income	47,729			49,292			47,536
Securities litigation income	12			111			32
Investment expenses	(2,262		)	(1,913		)	(1,986		)
Net investment income	$	45,479		$	47,490		$	45,582

A summary of net changes in unrealized holding gains (losses) on securities available-for-sale is included in the table below.



	Year ended December 31,
($ in thousands)	2017		2016			2015
Fixed maturity securities	$	11,676	$	(20,634	)	$	(16,685	)
Deferred income tax expense (benefit)	4,086		(7,222		)	(5,840		)
Total fixed maturity securities	7,590		(13,412		)	(10,845		)

Equity securities	17,481		4,293			(10,997		)
Deferred income tax expense (benefit)	6,119		1,502			(3,849		)
Total equity securities	11,362		2,791			(7,148		)
Total available-for-sale securities	$	18,952	$	(10,621	)	$	(17,993	)