Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 Loans Office OptionPlan Impaired_loans Financial_Centers Inactive_Subsidiaries Banking_Centers Wealth_Management_Offices	Dec. 31, 2010	Oct. 16, 2009
Summary of Significant Accounting Policies (Textual) [Abstract]
Number of inactive subsidiaries	3
FCB Trust II redemption	Jan. 07, 2012
Bank operated business financial centers, number	42
Bank operated commercial banking centers, number	5
Bank operated wealth management offices, number	2
Number of days on which collection of interest on principal is no longer probable	90 days
Period over which borrower has to demonstrate repayment performance in compliance with restructured terms to take loan out of nonaccrual status	6 months
Number of days on which charge offs unsecured consumer loan are recorded	120 days
Single-family mortgage loans returned to accrual status after demonstrating sustained repayment performance	11
Number of performing, impaired loans	16
Impaired loans, specific reserves	$ 3,000,000
Non-covered impaired loans with related allowance	2,968,000	4,059,000
Maximum loan amount for credit review process	1,000,000
Estimated gross cash flows from loss sharing asset			144,900,000
Properties under capital lease and leasehold improvements amortizable description	shorter of estimated economic lives of 15 years or the initial terms of the leases
Properties under capital lease and leasehold estimated economic lives under option one	15 years
Number of Stock-Based Compensation Plans	3
Number of offices providing services, Citizens trust	2
Assets under administration, Citizens Trust	2,000,000,000
Assets under management, Citizens Trust	1,600,000,000
Core deposit and premium	5,548,000	9,029,000
Goodwill	55,097,000	55,097,000
Accumulated amortization	26,451,000	22,970,000
Estimated amortization expense, for year one	2,159,000
Estimated amortization expense, for year two	1,127,000
Estimated amortization expense, for year three	475,000
Estimated amortization expense, for year four	437,000
Estimated amortization expense, for year five	$ 395,000
Banks re-default rate	2.35%	1.19%
Original Term of Modified Loans	6 months
Computer and equipment [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Estimated lives, minimum years	3
Estimated lives, maximum years	5
Furniture, fixtures and equipment [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Estimated lives, minimum years	5
Estimated lives, maximum years	7
Buildings and improvements [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Estimated lives, minimum years	15
Estimated lives, maximum years	40
Maximum [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Number of days for which principal or interest payment on non-covered loans remain accrual	89 days
Minimum [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Number of days over which principal or interest payment are past due to consider non-covered loans	30 days
Number of days for which principal or interest payment on non-covered loans remain accrual	30 days