Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 97,906,000	$ 42,006,000
Depreciation, Amortization and Accretion, Net	28,434,000	23,768,000
Allowance for Loan and Lease Losses, Period Increase (Decrease)	9,436,000	(2,872,000)
Provision for Loan and Lease Losses	11,098,000	(3,902,000)
Gains (Losses) on Sales of Other Real Estate	2,746,000	4,006,000
Provision for Loan Losses Expensed	5,065,000	2,094,000
Gain (Loss) on Sale of Loans and Leases	594,000	1,108,000
Gain (Loss) on Disposition of Property Plant Equipment	1,523,000	15,000
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	(4,841,000)	(5,631,000)
Foreign Currency Transaction Gain (Loss), before Tax	1,331,000	0
Unrealized Gain (Loss) on Derivatives	1,062,000	0
Share-based Compensation	33,641,000	6,545,000
Goodwill, Period Increase (Decrease)	6,645,000	0
Goodwill, Impairment Loss	(6,645,000)
Excess Tax Benefit from Share-based Compensation, Operating Activities	4,402,000	985,000
Increase (Decrease) in Income Taxes	47,938,000	4,267,000
Increase Decrease In FDIC Loss Sharing Asset	22,547,000	19,063,000
Increase (Decrease) in Other Operating Assets	8,206,000	(6,254,000)
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities	(79,644,000)	(22,952,000)
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	147,263,000	66,428,000
Investing Activities:
Cash Acquired from Acquisition	346,047,000	273,013,000
Payments for (Proceeds from) Loans and Leases	433,525,000	(221,779,000)
Proceeds from Sale of Loans Held-for-investment	35,696,000	18,812,000
Proceeds from Sale and Maturity of Available-for-sale Securities	95,039,000	264,654,000
Proceeds from Sale of Available-for-sale Securities	465,608,000	12,810,000
Capitalized Costs To Complete Other Real Estate Owned	186,969,000	504,936,000
Proceeds from Sale of Other Receivables	484,084,000	0
Payments to Acquire Property, Plant, and Equipment	(28,397,000)	(12,549,000)
Proceeds from Sale of Property, Plant, and Equipment	20,097,000	28,918,000
Net Cash Provided by (Used in) Investing Activities	(2,283,000)	(2,246,000)
Proceeds from Sale of Real Estate Held-for-investment	3,759,000	26,000
Purchases Of Equipment Leased To Others Under Operating Leases	(30,502,000)	0
Payments to Acquire Available-for-sale Securities	(886,452,000)	(325,379,000)
Financing activities:
Increase Decrease In Noninterest Bearing Domestic and Foreign Deposits	420,478,000	28,310,000
Increase Decrease In Interest Bearing Domestic And Foreign Deposits	(518,012,000)	(405,166,000)
Proceeds from (Repayments of) Debt	(742,109,000)	(4,258,000)
Payments for Repurchase of Common Stock	22,307,000	2,415,000
Excess Tax Benefit from Share-based Compensation, Financing Activities	4,402,000	985,000
Payments of Ordinary Dividends, Common Stock	62,727,000	29,648,000
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	(920,275,000)	(412,192,000)
Noncash transactions from investing activities:
Interest Paid	(23,959,000)	(10,604,000)
Proceeds from Income Tax Refunds	3,829,000	16,703,000
Real Estate Owned, Transfer from Real Estate Owned	667,000	12,754,000
Net Cash Provided by (Used in) Continuing Operations	(113,440,000)	20,385,000
Total cash and cash equivalents	260,862,000	144,019,000
Capitalsource, Inc. [Member]
Noncash transactions from investing activities:
Stock Issued	2,594,070,000	0
First California Financial Group, Inc. [Domain]
Noncash transactions from investing activities:
Stock Issued	$ 0	$ 242,268,000