Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2015
Variable Interest Entity [Line Items]
Original benefit of contribution by tax credit investors	$ (4,882)	$ 0
Cloverleaf
Variable Interest Entity [Line Items]
Original benefit of contribution by tax credit investors			$ 5,600
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Contribution liability	$ 4,900