Tax Credit Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Affordable housing tax credit investment, net	$ 146,556		$ 153,351
Other tax credit investments, net	63,658		64,354
Total TCIs, net	210,214		217,705
Unfunded affordable housing tax credit commitments	15,331		16,684
Other tax credit liabilities	54,823		55,105
Total unfunded tax credit commitments and liabilities	70,154		$ 71,789
Affordable housing tax credits and other tax benefits	(7,194)	$ (7,575)
Other tax credit investment credits and tax benefits	(941)	(1,136)
Amortization of affordable housing investments, net of tax benefit	5,024	5,495
Deferred tax expense	208	238
Total reduction in income tax expense	(2,903)	(2,978)
Affordable housing tax credits investment	1,022	822
Other tax credit investment amortization	428	669
Total amortization of TCIs	$ 1,450	$ 1,491