Loans and Leases - Net Investments in Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Minimum lease payments receivable	$ 154,635	$ 130,811
Unearned lease income	(22,010)	(19,861)
Initial direct costs and deferred fees	5,848	4,451
Total Leases	138,473	115,401
Originated
Loans and Leases Receivable Disclosure [Line Items]
Minimum lease payments receivable	122,596	75,592
Unearned lease income	(17,717)	(10,338)
Initial direct costs and deferred fees	5,055	2,781
Total Leases	109,934	68,035
Acquired
Loans and Leases Receivable Disclosure [Line Items]
Minimum lease payments receivable	32,039	55,219
Unearned lease income	(4,293)	(9,523)
Initial direct costs and deferred fees	793	1,670
Total Leases	$ 28,539	$ 47,366