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Capital Stock (Tables)
12 Months Ended
Dec. 31, 2019
Stockholders' Equity Note [Abstract]  
Schedule of Activity in the Company's Common Shares Outstanding
Activity in the Company’s common shares outstanding is set forth below for the three years ended December 31, 2019 (in thousands):
 
Common Stock

OUTSTANDING AT DECEMBER 31, 2016
55,532

Exercise of stock options/stock appreciation rights
53

Director compensation arrangements, net
10

Restricted/performance shares activity, net of forfeitures
89

Acquisition/surrender of shares
(802
)
OUTSTANDING AT DECEMBER 31, 2017
54,882

Exercise of stock appreciation rights
66

Director compensation arrangements, net
11

Restricted/performance shares activity, net of forfeitures
165

Acquisition/surrender of shares
(409
)
OUTSTANDING AT DECEMBER 31, 2018
54,715

Exercise of stock appreciation rights
84

Director compensation arrangements, net
10

Restricted/performance shares activity, net of forfeitures
39

Acquisition/surrender of shares
(334
)
OUTSTANDING AT DECEMBER 31, 2019
54,514


Schedule of Shares of the Company's Reserved Common Stock
Shares of the Company’s common stock were reserved at December 31, 2019 as follows (in thousands): 
 
Common Stock

 
Future grant of stock-based compensation
2,333

Shares reserved under other equity compensation plans
152

TOTAL
2,485