Regulatory Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2018

Regulatory Capital Requirements [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 December 31,						At December 31,
(Dollars in thousands)	2018			2017			2018			2017			Well-capitalized Standard		Minimum Capital Requirement(1)
Regulatory Capital:
Common equity Tier 1 capital	$	2,224,183		$	2,242,410		$	2,282,013		$	2,409,027
Tier 1 capital	2,408,393			2,522,178			2,300,472			2,426,854
Total capital	2,750,581			2,889,323			2,675,347			2,837,374
Regulatory Capital Ratios:
Common equity Tier 1 capital ratio	10.82		%	10.79		%	11.10		%	11.59		%	6.50	%	4.50	%
Tier 1 risk-based capital ratio	11.72			12.14			11.19			11.68			8.00		6.00
Total risk-based capital ratio	13.38			13.90			13.01			13.65			10.00		8.00
Tier 1 leverage ratio	10.44			11.12			9.97			10.70			5.00		4.00

(1) Excludes capital conservation buffer of 1.875% and 1.25% at December 31, 2018 and 2017, respectively.