Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value [Abstract]

Fair Value of Assets Measured on a Recurring Basis

The following table presents for each of the fair value hierarchy levels, our assets that are measured at fair value on a recurring basis at December 31, 2017 and December 31, 2016 (in thousands).

	As of December 31, 2017
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
U.S. Treasury securities and obligations of U.S. Government	$	-	$	49,947	$	-	$	49,947
Corporate bonds		-		278,760		313		279,073
Collateralized corporate bank loans		-		125,937		-		125,937
Municipal bonds		-		131,433		2,823		134,256
Mortgage-backed		-		16,533		-		16,533
Total debt securities		-		602,610		3,136		605,746
Total equity securities		51,142		-		621		51,763
Total other investments		3,824		-		-		3,824
Total investments	$	54,966	$	602,610	$	3,757	$	661,333

	As of December 31, 2016
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
U.S. Treasury securities and obligations of U.S. Government	$	-	$	42,022	$	-	$	42,022
Corporate bonds		-		226,062		-		226,062
Collateralized corporate bank loans		-		106,009		-		106,009
Municipal bonds		-		158,216		5,679		163,895
Mortgage-backed		-		59,469		-		59,469
Total debt securities		-		591,778		5,679		597,457
Total equity securities		51,445		-		266		51,711
Total other investments		4,951		-		-		4,951
Total investments	$	56,396	$	591,778	$	5,945	$	654,119

Fair Value, Assets Measured on Recurring Basis Using Significant Unobservable Inputs (Level 3)

The following table summarizes the changes in fair value for all financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the year ended December 31, 2017 and 2016 (in thousands).

	2017		2016
Beginning balance as of January 1	$	5,945	$	14,087
Sales		-		-
Settlements		(579)		(8,825)
Purchases		775		-
Issuances		-		-
Total realized/unrealized gains included in net income		616		417
Net gain included in other comprehensive income		-		-
Transfers into Level 3		-		266
Transfers out of Level 3		(3,000)		-
Ending balance as of December 31	$	3,757	$	5,945