Common Stock and Stock-Based Compensation Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Payment Arrangement, Activity [Table Text Block]

The following table summarizes stock-based compensation awards granted during the six months ended June 30, 2020:

	Number of Shares Granted	Weighted Average Grant-Date Fair Value per Award
Stock options	300,000	$	5.26
Restricted stock units	975,900	$	18.57
Restricted stock awards	17,740	$	18.18
Performance units	444,252	$	20.31

The fair value of the stock options granted was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions:

	Six Months Ended June 30, 2020
Exercise price	$	21.61
Risk-free interest rate	1.48		%
Expected life (in years)	6.50
Equity volatility	35.0		%
Dividend yield	3.42		%