Balance Sheet Parentheticals (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Preferred Stock, Shares Authorized	300	300
Preferred Stock, Shares Outstanding	0	0
Treasury Stock, Shares	3,135	3,135
Common Class A [Member]
Common Stock, Shares Authorized	100,000	100,000
Common Stock, Shares, Issued	34,053	33,952
Common Stock, Par or Stated Value Per Share	$ 0	$ 0
Common Class B [Member]
Common Stock, Shares Authorized	12,000	12,000
Common Stock, Shares, Issued	1,085	1,086
Common Stock, Par or Stated Value Per Share	$ 0	$ 0