Condensed Consolidated Balance Sheets Parenthetical	Jun. 30, 2014	Dec. 31, 2013
Common Class A [Member]
Common Stock, Shares, Issued	23,775,997	23,680,749
Common Stock, Shares, Outstanding	23,775,875	23,680,627
Common Class B [Member]
Common Stock, Shares, Issued	5,094,306	5,096,780
Common Stock, Shares, Outstanding	5,093,389	5,095,863
Treasury Class A [Member]
Treasury Stock, Shares	122	122
Treasury Class B [Member]
Treasury Stock, Shares	917	917