Subordinated Debentures (Details Textual)	12 Months Ended
	Dec. 31, 2018
Debt Instruments [Abstract]
Maximum Number of Consecutive Quarters for Deferral of Interest Payments on Trust Preferred Securities	20
Size of company eligible for Tier 1 grandfather provision	15,000,000,000
Number of Years Before Allowed to Prepay Tier 2 Subordinated Debt	5