Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summarized Information of Location and Gross Amount of Derivatives' Fair Value in Consolidated Balance Sheets

The following table summarizes information on the location and the gross amount of the derivatives’ fair value on the consolidated balance sheets as of September 30, 2019 and December 31, 2018:

(Dollars in thousands)		September 30, 2019					December 31, 2018
Derivatives Not Designated as Hedging Instruments under ASC 815	Balance Sheet Location	Notional Amount		Fair Value			Notional Amount		Fair Value
Interest rate swap agreements	Other assets/liabilities	$	200,000	$	(12,422	)	$	200,000	$	(4,062	)
Futures contracts on bonds (1)	Other assets/liabilities		20,726		—			—		—
Futures contracts on equities (1)	Other assets/liabilities		11,388		—			—		—
Total		$	232,114	$	(12,422	)	$	200,000	$	(4,062	)

(1) Futures are settled daily such that their fair value is not reflected in the consolidated statements of financial position

Summary of Net Gain (Loss) Included in Consolidated Statements of Operations for Changes in Fair Value of Derivatives and Periodic Net Interest Settlements Under Derivatives

The following table summarizes the net gains (losses) included in the consolidated statements of operations for changes in the fair value of the derivatives and the periodic net interest settlements under the derivatives for the quarters and nine months ended September 30, 2019  and 2018:

		Quarters Ended September 30,					Nine Months Ended September 30,
(Dollars in thousands)	Consolidated Statements of Operations Line	2019			2018		2019			2018
Interest rate swap agreements	Net realized investment gains (losses)	$	(1,831	)	$	1,311	$	(9,064	)	$	6,959
Futures contracts on bonds	Net realized investment gains (losses)		15			—		15			—
Futures contracts on equities	Net realized investment gains (losses)		(355	)		—		(355	)		—
Total		$	(2,171	)	$	1,311	$	(9,404	)	$	6,959