Fair Value Measurements - Schedule of Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - Level 3 - State tax credits held for sale, at fair value - Recurring basis - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Level 3 Financial Instruments Measured at Fair Value
Beginning balance	$ 0	$ 299	$ 0	$ 400
Total gains:
Total gains:	0	7	0	13
Purchases, sales, issuances and settlements:
Sales	0	(135)	0	(242)
Ending balance	0	171	0	171
Change in unrealized gains relating to assets still held at the reporting date	$ 0	$ (34)	$ 0	$ (60)