Borrowings Borrowings Details 1 (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Subordinated Borrowing [Line Items]
Subordinated debentures	$ 433,545		$ 132,645
Subordinated Debt Trust V Due September 2033 [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	10,310		10,310
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.33%	[1]	3.34%	[2]
Debt Instrument Date Issued	Aug. 15, 2003
Debt Instrument, Maturity Date	Sep. 17, 2033
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 3.10
Subordinated Debt Trust VI Due September 2033 [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	10,310		10,310
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.28%	[1]	3.29%	[2]
Debt Instrument Date Issued	Sep. 03, 2003
Debt Instrument, Maturity Date	Sep. 15, 2033
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 3.05
Subordinated Debt Trust CII Due September 2033 [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	5,155		5,155
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.18%	[1]	3.19%	[2]
Debt Instrument Date Issued	Sep. 17, 2003
Debt Instrument, Maturity Date	Sep. 17, 2033
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 2.95
Subordinated Debt Trust VII Due April 2034 [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	61,856		61,856
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.99%	[1]	2.99%	[2]
Debt Instrument Date Issued	Feb. 05, 2004
Debt Instrument, Maturity Date	Apr. 23, 2034
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 2.75
Subordinated Debt Trust CIII Due September 2035 [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	20,619		20,619
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	1.92%	[1]	1.93%	[2]
Debt Instrument Date Issued	Aug. 15, 2005
Debt Instrument, Maturity Date	Sep. 15, 2035
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.69
Subordinated Debt Trust FCCI Due March 2037 [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	16,495		16,495
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	1.83%	[1]	1.84%	[2]
Debt Instrument Date Issued	Jan. 25, 2007
Debt Instrument, Maturity Date	Mar. 15, 2037
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.60
Subordinated Debt Trust FCBI Due December 2035 [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	10,310		10,310
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	1.78%	[1]	1.79%	[2]
Debt Instrument Date Issued	Sep. 30, 2005
Debt Instrument, Maturity Date	Dec. 15, 2035
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.55
Trust Preferred Securities Two Thousand Five Series One [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	82,475	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.18%	[1],[3]
Debt Instrument Date Issued	Nov. 21, 2005
Debt Instrument, Maturity Date	Dec. 15, 2035
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Five Series Two [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	128,866	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.19%	[1],[3]
Debt Instrument Date Issued	Dec. 14, 2005
Debt Instrument, Maturity Date	Jan. 30, 2036
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.95
Two Thousand Six One Term Debt Securitization [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	51,545	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.19%	[1],[3]
Debt Instrument Date Issued	Feb. 22, 2006
Debt Instrument, Maturity Date	Apr. 30, 2036
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.95
Two Thousand Six Two Term Debt Securitization [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	51,550	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.19%	[1],[3]
Debt Instrument Date Issued	Sep. 27, 2006
Debt Instrument, Maturity Date	Oct. 30, 2036
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Six Series Three [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	32,551	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	1.29%	[1],[3]
Debt Instrument Date Issued	Sep. 29, 2006
Debt Instrument, Maturity Date	Oct. 30, 2036
Debt Instrument, Basis Spread on Variable Rate	3 month EURIBOR + 2.05
Trust Preferred Securities Two Thousand Six Series Four [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	16,470	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.19%	[1],[3]
Debt Instrument Date Issued	Dec. 05, 2006
Debt Instrument, Maturity Date	Jan. 30, 2037
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Six Series Five [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	6,650	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.19%	[1],[3]
Debt Instrument Date Issued	Dec. 19, 2006
Debt Instrument, Maturity Date	Jan. 30, 2037
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.95
Two Thousand Seven One Term Debt Securitization [Member]
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	39,177	[3]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.19%	[1],[3]
Debt Instrument Date Issued	Jun. 13, 2007
Debt Instrument, Maturity Date	Jul. 30, 2037
Debt Instrument, Basis Spread on Variable Rate	3 month LIBOR + 1.95
Subordinated Debt [Member]
Subordinated Borrowing [Line Items]
Debt Instrument, Unamortized Discount	(110,794)	[4]	(2,410)
Subordinated debentures	433,545		132,645
Long-term Debt, Gross	$ 544,339		$ 135,055

[1] (1)As of September 30, 2014.

[2] (2)As of January 28, 2014.

[3] (3)Acquired in the CapitalSource Inc. merger.

[4] (4)Amount represents the fair value adjustment on trust preferred securities assumed in the CapitalSource Inc. and FCAL acquisitions.