Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Amortized Cost
Due in one year or less	$ 8,625
Due after one but within five years	34,530
Due after five but within ten years	88,184
Due after ten years	598,793
Total of securities having specified maturity period	730,132
Mortgage-backed securities and equities	188,781
TOTAL	918,913	920,897
Fair Value
Due in one year or less	8,795
Due after one but within five years	36,064
Due after five but within ten years	91,103
Due after ten years	590,454
Total of securities having specified maturities period	726,416
Mortgage-backed securities and equities	194,749
Fair Value	$ 921,165	$ 914,560