Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2015

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 December 31, 2015 and 2014:

(Dollars in thousands) Derivatives Not Designated as Hedging Instruments under ASC 815	Balance Sheet Location	December 31, 2015					December 31, 2014
		Notional Amount		Fair Value			Notional Amount		Fair Value
Interest rate swap agreements	Other liabilities	$	200,000	$	(15,256	)	$	200,000	$	(13,675	)

Summary of Net Losses Included in Consolidated Statement 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 statement of operations for changes in the fair value of the derivatives and the periodic net interest settlements under the derivatives for the years ended December 31, 2015, 2014, and 2013:

(Dollars in thousands)	Statement of Operations Line	Years Ended December 31,
		2015			2014			2013
Interest rate swap agreements	Net realized investment gains (losses)	$	(6,988	)	$	(20,836	)	$	1,427