Balance Sheet Parentheticals (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Preferred Stock, Shares Authorized	300	300
Preferred Stock, Shares Outstanding	0	0
Treasury Stock, Shares	3,164	3,158
Common Class A [Member]
Common Stock, Shares Authorized	100,000	100,000
Common Stock, Shares, Issued	34,220	34,084
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	1,086	1,086
Common Stock, Par or Stated Value Per Share	$ 0	$ 0