Investment in Qualified Affordable Housing (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Investment in qualified affordable housing tax credits amortization	$ 1,800	$ 1,900	$ 5,438	$ 5,553
Affordable housing tax credit investments	54,909		54,909		$ 50,347
Affordable Housing Program Obligation	28,439		28,439		$ 22,282
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ 2,600	$ 2,000	$ 6,900