Investment Securities (Detail Textuals 2) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) Security	Dec. 31, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	$ 696,257	$ 691,563
Amortized cost of trust preferred security	$ 682,637	$ 691,533
Corporate Securities
Schedule of Available-for-sale Securities [Line Items]
Number of available for sale securities held in portfolio | Security	45
Available-for-sale securities	$ 119,216
Gross unrealized losses	$ 1,018
Number of securities in unrealized loss position | Security	13
Corporate Securities | Entities rated lower medium investment grade or higher
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	$ 992
Number of securities in unrealized loss position | Security	12
Trust preferred securities
Schedule of Available-for-sale Securities [Line Items]
Number of available for sale securities held in portfolio | Security	1
Amortized cost of trust preferred security	$ 250
Gross unrealized losses	26
Available for sale securities, fair value	$ 224