Net Investment Income (Tables)

12 Months Ended

Dec. 31, 2018

Net Investment Income [Abstract]

Schedule of Net Investment Income

The components of net investment income are as follows:

	Year ended December 31,
	2018			2017			2016
	(in thousands)
Interest on:
Cash, cash equivalents and deposits with banks	$	21,910		$	7,321		$	3,989
Debt securities		138,409			104,458			89,920
Other investments		64,328			22,221			7,818
Dividends on equity securities		12,718			12,925			12,684
Deferred compensation plan assets		(6,399	)		14,211			5,861
Equity in earnings of affiliates, net		2,717			3,785			8,173
Other		106			607			130
Total investment income		233,789			165,528			128,575
Investment expenses		(3,500	)		(3,126	)		(2,441	)
Net investment income	$	230,289		$	162,402		$	126,134