Investments Securities

6 Months Ended

Jun. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities.    Investment securities we hold are recorded at fair value in the accompanying consolidated balance sheets. We apply regulated operations accounting to the unrealized gains and losses of all investment securities. All realized and unrealized gains and losses are determined using the specific identification method. At June 30, 2020, investments with a fair value of $11,271,000 were in an unrealized loss position for greater than one year and represented approximately 68% of our gross unrealized losses, while investments with a fair value of $45,247,000 were in an unrealized loss position for less than one year. At December 31, 2019, investments with a fair value of $22,352,000 were in an unrealized loss position for greater than one year and represented approximately 86% of our gross unrealized losses, while investments with a fair value of $69,567,000 were in an unrealized loss position for less than one year.

The following tables summarize debt and equity securities as of June 30, 2020 and December 31, 2019.

	Gross Unrealized
	(dollars in thousands)
June 30, 2020	Cost		Gains		Losses		Fair Value
Equity	$	256,741	$	125,801	$	(11,151)	$	371,391
Debt	440,600		21,243		(1,146)		460,697
Other	8,270		—		(10)		8,260
Total	$	705,611	$	147,044	$	(12,307)	$	840,348

	Gross Unrealized
	(dollars in thousands)
December 31, 2019	Cost		Gains		Losses		Fair Value
Equity	$	258,870	$	144,832	$	(5,990)	$	397,712
Debt	354,535		8,474		(874)		362,135
Other	6,356		—		—		6,356
Total	$	619,761	$	153,306	$	(6,864)	$	766,203