Unaudited Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2011	Dec. 31, 2010
Class A Voting [Member]
Shareholders' equity:
Common stock, shares authorized (in shares)	3,000,000	3,000,000
Common stock, shares outstanding (in shares)	2,623,109	2,623,109
Class B Non-voting [Member]
Shareholders' equity:
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares outstanding (in shares)	12,218,367	12,187,009