Goodwill and Other Intangible Assets (Details Textual) - USD ($)	3 Months Ended					9 Months Ended		12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill, Subsequent Recognition of Deferred Tax Asset			$ 7,900,000			$ 7,901,000
Adjustment to acquired CapitalSource Inc. deferred tax assets						$ 0	$ 0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						3 years 9 months 10 days
Intangible asset amortization	$ 1,497,000	$ 1,502,000		$ 1,608,000		$ 4,500,000	4,649,000
Aggregate Amortization Expense 2016	4,100,000					4,100,000
Aggregate Amortization Expense 2017	2,300,000					2,300,000
Aggregate Amortization Expense 2018	2,000,000					2,000,000
Aggregate Amortization Expense 2019	1,700,000					1,700,000
Aggregate Amortization Expense 2020	953,000					953,000
Goodwill, Written off Related to Sale of Business Unit					$ 6,600,000	0	(6,645,000)
Impairment of Intangible Assets, Finite-lived	0	0		0		0	804,000
Scenario, Forecast [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization								$ 6,000,000
CDI and CRI [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 0	$ 0		$ 0		$ 0	$ 1,300,000
CDI and CRI [Member] | CapitalSource Inc. [Member] [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived					$ 500,000