XML 18 R3.htm IDEA: XBRL DOCUMENT v3.3.1.900
Consolidated Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2015
Dec. 31, 2014
Common Class A [Member]    
Common stock, shares authorized (in shares) 60,000,000 60,000,000
Common stock, shares outstanding (in shares) 30,303,818 29,889,332
Common Class B [Member]    
Common stock, shares authorized (in shares) 20,000,000 20,000,000
Common stock, shares outstanding (in shares) 10,093,305 9,999,122
Treasury stock, shares (in shares) 2,616,657 2,560,580
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01