Regulatory Capital Requirements (Tables)

9 Months Ended

Sep. 30, 2019

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Regulatory Capital Information for TCF and TCF Bank

Regulatory capital information for TCF and TCF Bank was as follows:

	TCF						TCF Bank
	At September 30,			At December 31,			At September 30,			At December 31,			Well-capitalized Standard under Prompt Corrective Action Provisions		Minimum Capital Requirement for Capital Adequacy Plus Conservation Buffer
(Dollars in thousands)	2019			2018			2019			2018
Regulatory Capital:
Common equity Tier 1 capital	$	4,009,214		$	2,224,183		$	3,991,895		$	2,282,013
Tier 1 capital	4,197,706			2,408,393			4,015,208			2,300,472
Total capital	4,652,708			2,750,581			4,487,968			2,675,347
Regulatory Capital Ratios:
Common equity Tier 1 capital ratio	10.88		%	10.82		%	10.85		%	11.10		%	6.50	%	7.00	%
Tier 1 risk-based capital ratio	11.40			11.72			10.91			11.19			8.00		8.50
Total risk-based capital ratio	12.63			13.38			12.20			13.01			10.00		10.50
Tier 1 leverage ratio	11.16			10.44			10.68			9.97			5.00		4.00