Accumulated Other Comprehensive Loss (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Loss (Textual) [Abstract]
Net unrealized gains (losses) on investment securities-available-for-sale, tax expense (benefit)	$ (1,017)	$ (113)	$ (1,335)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Benefit	$ 14,616	$ 17,362	$ 9,714