Stock-based Compensation Plans Stock-based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation, Activity [Table Text Block]

A summary of the RSAs, RSUs, and PSUs granted during 2018 is presented below:

Grant Year	Award Type	Number of Shares/Units Awarded (in thousands)	Vesting Terms
2018	RSA	18	Vest equally over three service periods ending in February of 2019, 2020, and 2021
2018	RSU	16	Vest equally over three service periods ending December 31 of 2018, 2019, and 2020
2018	PSU	16	Three year performance and service period ending December 31, 2020
2018	RSU	3	One year service period ending in April 2019