Noncontrolling Interests (Details Textuals) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Noncontrolling Interests (Textuals) [Abstract]
Percentage of ownership interest in partnership	50.10%
Mandatorily Redeemable Noncontrolling Interests included in other liabilities	$ 10,059	$ 11,047	$ 11,683	$ 3,111