Other Intangibles - Schedule of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 85,869	$ 85,869
Accumulated amortization	(67,434)	(61,440)
Core Deposit and Other Intangibles	34,962	24,429
Core deposit intangible acquired
Acquired Finite-Lived Intangible Assets [Line Items]
Intangibles acquired	$ 16,527	$ 0