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Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Amortized Cost
Due in one year or less	$ 14,986
Due after one but within five years	31,614
Due after five but within ten years	86,775
Due after ten years	382,891
Total of securities having specified maturity period	516,266
Mortgage-backed securities and equities	234,077
TOTAL	750,343	668,615
Fair Value
Due in one year or less	15,195
Due after one but within five years	33,420
Due after five but within ten years	92,113
Due after ten years	383,146
Total of securities having specified maturities period	523,874
Mortgage-backed securities and equities	246,075
TOTAL	$ 769,949	$ 691,000

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