Share-based Compensation and Other Employment Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Share-based Compensation, Allocation of Recognized Period Costs

Total share-based compensation expense recognized for 2022, 2021, and 2020 is presented in the following table by its classification within total non-interest expense.

	Years Ended December 31,
(in thousands)	2022		2021		2020
Salaries and other personnel expense	$	26,751	$	26,957	$	17,827
Other operating expense	1,153		838		814
Total share-based compensation expense included in non-interest expense	$	27,904	$	27,795	$	18,641

Schedule of Measuring Compensation Expense

The fair value of performance share units, which include a market condition, was estimated on the date of grant using a Monte Carlo simulation model with the following weighted average assumptions:

	2022		2021		2020
Risk-free interest rate	2.87	%	2.87	%	1.42	%
Expected stock price volatility	57.2		56.1		25.4
Simulation period	2.9 years		2.9 years		3.0 years

Schedule of Stock Options Activity

A summary of stock option activity and changes during the years ended December 31, 2022, 2021, and 2020 is presented below.

Stock Options
	2022			2021			2020
(in thousands, except per share data)	Quantity	Weighted-Average Exercise Price		Quantity	Weighted-Average Exercise Price		Quantity	Weighted-Average Exercise Price
Outstanding at beginning of year	1,478	$	22.71	2,401	$	22.47	3,037	$	22.74
Assumed in acquisition	—	—		—	—		—	—
Options exercised	(365)	20.27		(923)	22.07		(572)	22.67
Options forfeited/expired/canceled	—	—		—	—		(64)	33.50
Options outstanding at end of year	1,113	$	23.51	1,478	$	22.71	2,401	$	22.47
Options exercisable at end of year	1,113	$	23.51	1,478	$	22.71	2,401	$	22.47

Schedule of Restricted Stock Units Activity

A summary of restricted share units and performance share units outstanding and changes during the years ended December 31, 2022, 2021, and 2020 is presented below.

	Restricted Share Units			Performance Share Units
(in thousands, except per share data)	Quantity	Weighted-Average Grant Date Fair Value		Quantity	Weighted-Average Grant Date Fair Value
Outstanding at December 31, 2019	817	$	38.32	495	$	40.85
Granted	822	32.42		204	37.74
Vested	(384)	38.04		(214)	41.31
Forfeited	(34)	35.97		(46)	39.03
Outstanding at December 31, 2020	1,221	34.50		439	39.37
Granted	599	42.31		141	42.94
Vested	(482)	37.05		(58)	42.43
Forfeited	(93)	31.41		—	—
Outstanding at December 31, 2021	1,245	37.00		522	37.59
Granted	608	48.14		29	54.76
Vested	(571)	36.98		(45)	38.86
Forfeited	(58)	42.21		(34)	43.06
Outstanding at December 31, 2022	1,224	$	41.80	472	$	44.11