Related Party Transaction (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended
	Apr. 07, 2014 Capitalsource, Inc. [Member]	Jun. 30, 2014 Capitalsource, Inc. [Member] Castle Creek Finance LLC [Member]	May 31, 2013 First California Financial Group, Inc. [Domain] Castle Creek Finance LLC [Member]	Jun. 30, 2013 First California Financial Group, Inc. [Domain] Castle Creek Finance LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction		$ 9		$ 1
Business Acquisition, Effective Date of Acquisition	Apr. 07, 2014		May 31, 2013