Operating Segments (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Summary of Operating Results by Segment

Summarized operating results by segment were as follows:

	Banking		Frost  Wealth Advisors		Non-Banks			Consolidated
Revenues from (expenses to) external customers:
Three months ended:
March 31, 2018	$	288,561	$	35,081	$	(2,449	)	$	321,193
March 31, 2017	258,911		34,588		(1,290		)	292,209
Net income (loss):
Three months ended:
March 31, 2018	$	103,641	$	5,634	$	(2,795	)	$	106,480
March 31, 2017	80,869		5,294		(1,222		)	84,941