Other Borrowings (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Summary of the balances of other borrowings
Total other borrowings	$ 8,125	$ 9,197
Other collateralized borrowings, fixed rate, as of March 31, 2013 of 0.05% payable on April 1, 2013 [Member]
Summary of the balances of other borrowings
Other collateralized borrowings, fixed rate, as of March 31, 2013 of 0.05% payable on April 1, 2013	$ 8,125	$ 9,197