Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Restricted Stock Unit, Activity

A summary of changes in the common shares subject to nonvested PBRSUs and TBRSUs for the years ended December 31, 2019 and 2018 follows:

	Common shares subject to PBRSUs and TBRSUs
Nonvested at January 1, 2018	116,716
Granted	61,690
Vested	(18,800)
Forfeited	(4,655)
Adjustment for performance conditions of PBRSUs (1)	(2,320)
Nonvested at January 1, 2019	152,631
Granted	74,440
Vested	(27,719)
Forfeited	(1,262)
Adjustment for performance conditions of PBRSUs (1)	(3,368)
Nonvested at December 31, 2019 (2)	194,722

(1) The number of PBRSUs earned depends on the level of achievement with respect to certain performance criteria. Adjustment herein represents the difference between the maximum number of common shares which could be earned and the actual number earned for those PBRSUs as to which the performance period was completed.

(2) Nonvested amount herein represents the maximum number of nonvested PBRSUs and TBRSUs. As of December 31, 2019, an aggregate of 175,033 PBRSUs and TBRSUs are expected to vest.

Share-based Payment Arrangement, Nonvested Award, Cost

The following table details expected additional share-based compensation expense related to PBRSUs and TBRSUs currently outstanding:

(In thousands)
2020	$	4,024
2021	2,370
2022	1,029
2023	162
Total	$	7,585