Investment income (Tables)

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Gross Realized Investment and Other Gains and Losses

Gross realized investment and other gains and losses follows:

	For the Three Months Ended   June 30,				For the Six Months Ended   June 30,
	2016		2015		2016		2015
	($000 omitted)
Realized gains	1,139		674		5,076		2,228
Realized losses	(173	)	(285	)	(3,622	)	(688	)
	966		389		1,454		1,540

Proceeds from Sale of Investments Available-for-Sale

The amortized costs and fair values follow:

	June 30, 2016		December 31, 2015
	Amortized costs	Fair values	Amortized costs	Fair values
	($000 omitted)
Debt securities:
Municipal	70,253	73,492	70,300	72,008
Corporate	334,085	351,069	303,870	309,461
Foreign	158,265	164,255	149,914	153,221
U.S. Treasury Bonds	12,793	12,946	13,803	13,906
Equity securities	28,046	34,286	27,497	31,253
	603,442	636,048	565,384	579,849

Proceeds from the sale of investments available-for-sale follows:

	For the Three Months Ended   June 30,		For the Six Months Ended   June 30,
	2016	2015	2016	2015
	($000 omitted)
Proceeds from sale of investments available-for-sale	21,500	22,035	32,827	45,936