Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Revenues

Revenues for the years ended December 31,2018, 2017 and 2016 consisted of the following:

		Year Ended December 31,
		2018		2017		2016
	(in thousands)
Subject to contracts with customers:
Investment advisory and services fees
Base fees		$	2,244,068	$	2,106,525	$	1,900,719
Performance-based fees		118,143		94,780		32,752
Bernstein research services		439,432		449,919		479,875
Distribution revenues
All-in-management fees		254,477		245,367		197,766
12b-1 fees		87,166		94,972		114,641
Other		76,919		71,724		71,998
Other revenues
Shareholder servicing fees		75,974		75,024		77,690
Other		19,211		17,838		16,703
		3,315,390		3,156,149		2,892,144
Not subject to contracts with customers:
Dividend and interest income, net of interest expense		45,827		45,997		37,816
Investment gains (losses)		2,653		92,102		93,353
Other revenues		3,491		4,273		5,466
		51,971		142,372		136,635
Total net revenues		$	3,367,361	$	3,298,521	$	3,028,779