Tax Credit Investments - Balance Sheet Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Assets:
Other tax credit investments, net		$ 68,100
Other Assets
Other Assets:
Affordable housing tax credit investments, net	$ 35,278	36,961
Other tax credit investments, net	55,669	68,052
Total tax credit investments, net	90,947	105,013
Other Liabilities
Other Liabilities:
Unfunded affordable housing tax credit commitments	2,781	4,520
Unfunded other tax credit commitments	8,756	8,756
Total unfunded tax credit commitments	$ 11,537	$ 13,276