Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating losses and other carryforwards	$ 70,820	$ 20,591
Acquisition-related fair value adjustments	44,800	0
Stock compensation and deferred compensation plans	42,980	32,686
Allowance for loan and lease losses	25,178	33,546
Nonaccrual interest	6,209	637
Investment securities available-for-sale	0	9,235
Other	5,516	3,787
Deferred tax assets	195,503	100,482
Valuation allowance	(12,840)	(14,291)
Total deferred tax assets, net of valuation allowance	182,663	86,191
Deferred tax liabilities:
Lease financing	339,691	297,603
Goodwill and other intangibles	35,031	2,290
Premises and equipment	30,122	40,130
Investment securities available-for-sale	16,760	0
Loan servicing rights	12,989	0
Loan fees and discounts	10,098	17,465
Prepaid expenses	9,508	7,921
Other	7,862	7,319
Total deferred tax liabilities	462,061	372,728
Net deferred tax liabilities	$ 279,398	$ 286,537