Capital Stock Reserved Common Stock (Details) In Thousands, unless otherwise specified	Dec. 31, 2014
Class A Common Stock
Class of Stock [Line Items]
Future grant of stock-based compensation	0
Exercise of stock purchase rights	0
Shares reserved under other equity compensation plans	0
TOTAL	0
Class B Common Stock
Class of Stock [Line Items]
Future grant of stock-based compensation	1,475
Exercise of stock purchase rights	0
Shares reserved under other equity compensation plans	96
TOTAL	1,571
Preferred Stock
Class of Stock [Line Items]
Future grant of stock-based compensation	0
Exercise of stock purchase rights	58
Shares reserved under other equity compensation plans	0
TOTAL	58