FAIR VALUE (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis

The Company’s financial instruments measured at fair value on a recurring basis and the level of the fair value hierarchy of inputs used consisted of the following:

	December 31, 2017
	Level 1		Level 2		Level 3		Total
	(In thousands)
Debt securities - available-for-sale, at fair value:
United States government obligations and authorities	$	51,219	$	46,918	$	—	$	98,137
Obligations of states and political subdivisions	—		66,266		—		66,266
Corporate securities	—		240,919		—		240,919
International securities	—		17,916		—		17,916
Debt securities, at fair value	51,219		372,019		—		423,238
Equity securities, at fair value	15,434		—		—		15,434
Total investments, at fair value	$	66,653	$	372,019	$	—	$	438,672

	December 31, 2016
	Level 1		Level 2		Level 3		Total
	(In thousands)
Debt securities - available-for-sale, at fair value:
United States government obligations and authorities	$	36,560	$	25,645	$	—	$	62,205
Obligations of states and political subdivisions	—		151,183		—		151,183
Corporate securities	—		149,505		—		149,505
International securities	—		11,863		—		11,863
Debt securities, at fair value	36,560		338,196		—		374,756
Equity securities, at fair value	28,960		415		—		29,375
Total investments, at fair value	$	65,520	$	338,611	$	—	$	404,131