Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Nonvested Restricted Shares

A summary of the status of the Company's non-vested RSAs as of December 31, 2020, and changes during the period then ended, is presented below:

	Shares (in thousands)	Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2020	707	$	34.99
Granted	284	18.35
Vested	(413)	32.68
Forfeited	(11)	25.94
Non-vested at December 31, 2020	567	$	28.50

	Year ended December 31,
	2020		2019		2018
Total fair value of shares vested (in thousands)	$	13,510	$	8,225	$	4,681
Weighted average fair value of RSAs granted	$	18.35	$	33.87	$	34.36

Schedule of Nonvested PSUs

A summary of the status of the Company's EPS PSUs as of December 31, 2020, and changes during the period then ended, is presented below:

	Shares (in thousands)	Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2020	263	$	32.58
Granted	203	19.06
Vested	—	—
Forfeited	(122)	32.71
Non-vested at December 31, 2020	344	$	24.58

	Year ended December 31,
	2020		2019		2018
Weighted average fair value of EPS PSUs granted	$	19.06	$	27.23	$	35.36

A summary of the status of the Company's TSR PSUs as of December 31, 2020, and changes during the period then ended, is presented below:

	Shares (in thousands)	Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2020	263	$	46.85
Granted	203	16.80
Vested	—	—
Forfeited	(122)	39.32
Non-vested at December 31, 2020	344	$	31.83

	Year ended December 31,
	2020		2019		2018
Weighted average fair value of TSR PSUs granted	$	16.80	$	49.20	$	46.51

Schedule of Valuation Assumptions Used to Determine Fair Value

	2020
Risk free interest rate	0.85%
Dividend yield	—%
Volatility factor of the expected market price of the common shares	33%
Expected term (in years)	2.83
Correlation coefficient	0.43

Schedule of Fair Value of the Option Component of the ESP Plan

	Year ended December 31,
	2020		2019		2018
Risk free interest rate	1.59	%	1.59	%	2.57	%
Dividend yield	2.71	%	2.27	%	2.23	%
Volatility factor of the expected market price of the common shares	36	%	36	%	33	%
Expected life for the options (in years)	1.0		1.0		1.0