Investment Securities (Detail Textuals) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) Security	Dec. 31, 2016 USD ($) Security
Investments Debt And Equity Securities [Abstract]
Available for sale securities reported at cost in other assets	$ 9,800	$ 9,800
Available for sale securities, pledged	$ 176,800	$ 167,600
Number of securities consisted in portfolio | Security	309	298
Number of securities in loss position | Security	205	216
Aggregate fair value of securities in loss position	$ 180,800	$ 188,600
Loss position for 12 months or longer	28,626	3,742
Gross unrealized losses	$ 3,000	$ 3,400