REGULATORY REQUIREMENTS (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%
Leverage Capital Required Ratio To Tangible Assets	3.00%
Percent Of Trust Preferred Securities Excluded From Tier One Starting In 2013	33.33%
Trust Preferred Securities	$ 243,500
Proforma Tier 1 Leverage Ratio	8.73%
Proforma Tier 1 Risk Based Ratio	13.60%
Proforma Total Risk Based Ratio	15.46%
Undivided Profits Elgible For Dividend Payments	1,769,289
Maximum Undivided Profits Elgible For Dividend Payment Without Changing Well Capitalized Status	876,000
Dividends, Common Stock, Cash	82,813	50,424	60,509
Average Required Maintence Of Non Interst Bearing Reserve Balance	161,585
Common Class A [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	200,000
Stock Repurchased During Period, Shares	112,471
Common Class B [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	25,000
Stock Repurchased During Period, Shares	37,863
Bancshares [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%	6.00%
Capital Required to be Well Capitalized	10.00%	10.00%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Tier One Leverage Capital Required for Capital Adequacy	2,072,610	1,935,559
Capital Required for Capital Adequacy	2,323,022	2,206,890
Tier One Risk Based Capital to Risk Weighted Assets	15.41%	14.86%
Capital to Risk Weighted Assets	17.27%	16.95%
Tier One Leverage Capital to Average Assets	9.90%	9.18%
Fcb [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%	6.00%
Capital Required to be Well Capitalized	10.00%	10.00%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Tier One Leverage Capital Required for Capital Adequacy	1,968,032	1,522,931
Capital Required for Capital Adequacy	$ 2,211,235	$ 1,754,847
Tier One Risk Based Capital to Risk Weighted Assets	14.75%	14.50%
Capital to Risk Weighted Assets	16.57%	16.71%
Tier One Leverage Capital to Average Assets	9.53%	8.40%