Related-Party Transactions (Amendments To The Share Repurchase Program For The Common Shares Approved For Repurchase) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Schedule Of Common Shares Repurchase [Line Items]
Common Shares Authorized for Repurchase, amount	$ 20,000,000
Amendment Date, 09/21/2004 [Member]
Schedule Of Common Shares Repurchase [Line Items]
Common Shares Authorized for Repurchase, amount	5,000,000
Amendment Date, 07/21/2008 [Member]
Schedule Of Common Shares Repurchase [Line Items]
Common Shares Authorized for Repurchase, amount	5,000,000
Amendment Date, 02/24/2010 [Member]
Schedule Of Common Shares Repurchase [Line Items]
Common Shares Authorized for Repurchase, amount	5,000,000
Amendment Date, 02/22/2012 [Member]
Schedule Of Common Shares Repurchase [Line Items]
Common Shares Authorized for Repurchase, amount	$ 5,000,000