Capital Stock (Tables)

12 Months Ended

Dec. 31, 2017

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, 2017 (in thousands):

	Common Stock
	Class A		Class B		Common Stock
OUTSTANDING AT DECEMBER 31, 2014	7,167		51,329		—
Exercise of stock options/stock appreciation rights	—		29		—
Director compensation arrangements, net	—		17		—
Restricted/performance shares activity, net of forfeitures	—		122		—
Acquisition/surrender of shares	—		(708	)	(119	)
Share reclassification	(7,167	)	(50,789	)	57,956
OUTSTANDING AT DECEMBER 31, 2015	—		—		57,837
Exercise of stock appreciation rights	—		—		78
Director compensation arrangements, net	—		—		6
Restricted/performance shares activity, net of forfeitures	—		—		98
Acquisition/surrender of shares	—		—		(2,487	)
OUTSTANDING AT DECEMBER 31, 2016	—		—		55,532
Exercise of 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

Schedule of Shares of the Company's Reserved Common Stock

Shares of the Company’s common stock were reserved at December 31, 2017 as follows (in thousands):

	Common Stock
Future grant of stock-based compensation	2,609
Shares reserved under other equity compensation plans	161
TOTAL	2,770