Goodwill and Other Intangible Assets - Other Intangible Assets, Net (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other intangible assets, net
Gross Amount	$ 28,999,000	$ 30,079,000
Accumulated Amortization	8,503,000	6,049,000
Impairment	0	368,000	$ 0
Net Amount	20,496,000	23,662,000
Amortization expense for intangible assets	3,400,000	2,000,000	$ 1,400,000
Estimated amortization expense for intangible assets
Estimated amortization expense for 2019	3,100,000
Estimated amortization expense for 2020	2,700,000
Estimated amortization expense for 2021	2,700,000
Estimated amortization expense for 2022	1,600,000
Estimated amortization expense for 2023	1,300,000
Program agreement
Other intangible assets, net
Gross Amount	14,700,000	14,700,000
Accumulated Amortization	408,000	49,000
Impairment	0	0
Net Amount	14,292,000	14,651,000
Non-compete agreement
Other intangible assets, net
Gross Amount	9,250,000	9,000,000
Accumulated Amortization	3,643,000	1,081,000
Impairment	0	0
Net Amount	5,607,000	7,919,000
Customer base intangibles
Other intangible assets, net
Gross Amount	2,000,000	3,330,000
Accumulated Amortization	1,950,000	2,630,000
Impairment	0	368,000
Net Amount	50,000	332,000
Deposit base intangibles
Other intangible assets, net
Gross Amount	3,049,000	3,049,000
Accumulated Amortization	2,502,000	2,289,000
Impairment	0	0
Net Amount	$ 547,000	$ 760,000