Restrictions on Cash, Securities, Bank Dividends, Loans or Advances (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Restrictions on Cash, Bank Dividends, Loans or Advances (Textual) [Abstract]
Reserve requirements with federal reserve	$ 109,044,000	$ 55,237,000
FHLB stock	9,589,000	22,839,000
FHLB required investment amount	7,611,000	$ 20,885,000
Amount transferable loans maximum	$ 87,191,000
Regulatory restrictions on payments of dividends, excess surplus ratio	10
Company borrowings	$ 0