Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Balance at the beginning of the period	$ 92,291,000	$ 92,623,000
Goodwill related to sale of portion of business unit	(8,000)	(332,000)
Balance at the end of the period	92,283,000	92,291,000
Reduction of goodwill	8,000	332,000
Impairment of goodwill and intangible assets	0
Banking
Goodwill [Roll Forward]
Balance at the beginning of the period	64,369,000	64,369,000
Goodwill related to sale of portion of business unit	0	0
Balance at the end of the period	64,369,000	64,369,000
Reduction of goodwill	0	0
Insurance
Goodwill [Roll Forward]
Balance at the beginning of the period	19,711,000	20,043,000
Goodwill related to sale of portion of business unit	(8,000)	(332,000)
Balance at the end of the period	19,703,000	19,711,000
Reduction of goodwill	8,000	332,000
Wealth Management
Goodwill [Roll Forward]
Balance at the beginning of the period	8,211,000	8,211,000
Goodwill related to sale of portion of business unit	0	0
Balance at the end of the period	8,211,000	8,211,000
Reduction of goodwill	$ 0	$ 0