Investment Securities Other Than Temporary Impairment Charges (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
Investment [Line Items]
Other than temporary impairment losses, investments, portion recognized in earnings, net, available-for-sale securities	$ 0	$ 30,000
Equity securities - financial institution stocks
Investment [Line Items]
Other than temporary impairment losses, investments, portion recognized in earnings, net, available-for-sale securities		12,000
Pooled trust preferred securities
Investment [Line Items]
Other than temporary impairment losses, investments, portion recognized in earnings, net, available-for-sale securities		$ 18,000