Capital Stock (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Capital Stock [Roll Forward]
Exercise of stock options	30,166	9,417	178,744
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited	12,925	10,631	4,900
Common Stock, Dividends, Per Share, Declared and Paid	$ 0.05
Class B Common Stock, Dividends, Per Share, Declared and Paid	$ 0.045
Common Stock Shares
Capital Stock [Roll Forward]
Beginning Balance	33,952,000	33,835,000	33,559,000
Exercise of stock options	30,000	10,000	180,000
Restricted stock awards	102,000	107,000	96,000
Purchase of shares for treasury			0
Ending Balance	34,084,000	33,952,000	33,835,000
Class B Shares
Capital Stock [Roll Forward]
Beginning Balance	1,086,000	1,086,000	1,086,000
Exercise of stock options	0	0	0
Restricted stock awards	0	0	0
Purchase of shares for treasury			0
Ending Balance	1,086,000	1,086,000	1,086,000
Treasury Shares
Capital Stock [Roll Forward]
Beginning Balance	(3,135,000)	(3,100,000)	(2,319,000)
Exercise of stock options	0	(8,000)	0
Restricted stock awards	(23,000)	(27,000)	(31,000)
Purchase of shares for treasury			750,000
Ending Balance	(3,158,000)	(3,135,000)	(3,100,000)