TRANSACTIONS WITH RELATED PERSONS (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance at January 1, 2011	$ 1,496
New loans	274
Repayments	459
Balance at December 31, 2011	1,311	1,496
Unfunded Loan Commitments Available To Related Parties	4,446	4,343
Revenue from Related Parties	33,653	34,536	33,654
Revenue From Largest Individual Institution Related Parties	22,793	23,463	22,024
Investment Securities Availabe For Sale Related Parties	16,069	14,777
Investment Cost Related Parties	$ 452	$ 508
Common Class B [Member]
Loans and Leases Receivable, Related Parties [Roll Forward]
Stock Repurchased and Retired During Period, Shares	606,829
Common Class B [Member] | Majority Shareholder [Member]
Loans and Leases Receivable, Related Parties [Roll Forward]
Stock Repurchased and Retired During Period, Shares	593,954