Federal and State Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of deferred tax assets and liabilities are as follows (in thousands):



	December 31,
	2019			2018
Deferred tax assets:
Credit loss reserves	$	50,611		$	49,804
Lease liability	46,084			—
Deferred compensation	25,976			25,608
Purchased loan discount	18,042			27,283
Unearned fees	9,080			9,814
Share-based compensation	7,392			4,434
Valuation adjustments	1,545			9,619
Available for sale securities mark to market	—			24,441
Other	26,384			31,489
Total deferred tax assets	185,114			182,492

Deferred tax liabilities:
Mortgage servicing rights	48,435			61,844
Right-of-use asset	42,180			—
Available for sale securities mark to market	33,140			—
Acquired identifiable intangible	23,181			28,620
Depreciation	18,909			15,966
Lease financing	10,720			10,040
Other	34,826			30,566
Total deferred tax liabilities	211,391			147,036
Net deferred tax assets (liabilities)	$	(26,277	)	$	35,456

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The significant components of the provision for income taxes attributable to continuing operations for BOK Financial are shown below (in thousands):



	Year Ended December 31,
	2019		2018			2017
Current income tax expense:
Federal	$	110,887	$	103,748		$	141,607
State	15,088		15,253			14,592
Total current income tax expense	125,975		119,001			156,199

Deferred income tax expense:
Federal	3,416		(190		)	25,525
State	792		250			869
Total deferred income tax expense	4,208		60			26,394
Total income tax expense	$	130,183	$	119,061		$	182,593

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The reconciliations of income attributable to continuing operations at the U.S. federal statutory tax rate to income tax expense are as follows (in thousands):



	Year Ended December 31,
	2019			2018			2017
Amount:
Federal statutory tax	$	132,482		$	118,752		$	181,397
Tax exempt revenue	(12,227		)	(8,311		)	(12,402		)
Effect of state income taxes, net of federal benefit	12,715			12,430			10,701
Utilization of tax credits, net of proportional amortization of low-income housing limited partnership investments	(5,127		)	(4,559		)	(6,811		)
Other, net	2,340			749			9,708
Total income tax expense	$	130,183		$	119,061		$	182,593



	Year Ended December 31,
	2019		2018		2017
Percent of pretax income:
Federal statutory tax	21.0	%	21.0	%	35.0	%
Tax exempt revenue	(1.9	)	(1.5	)	(2.4	)
Effect of state income taxes, net of federal benefit	2.0		2.2		2.0
Utilization of tax credits, net of proportional amortization of low-income housing limited partnership investments	(0.8	)	(0.8	)	(1.3	)
Other, net	0.3		0.2		1.9
Total	20.6	%	21.1	%	35.2	%

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):



	2019			2018			2017
Balance as of January 1	$	18,869		$	18,110		$	15,841
Additions for tax for current year positions	5,649			2,649			4,645
Settlements during the period	—			—			—
Lapses of applicable statute of limitations	(4,053		)	(1,890		)	(2,376		)
Balance as of December 31	$	20,465		$	18,869		$	18,110