Consolidated Statements of Changes in Shareholders' Equity - Unaudited - USD ($) $ in Thousands		Total	Preferred Stock	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance, preferred stock (shares) at Dec. 31, 2020			9,000,000
Beginning balance at Dec. 31, 2020		$ 1,117,086	$ 217,471	$ 32,986	$ 455,592	$ 438,581	$ (5,764)	$ (21,780)
Beginning balance, common stock (shares) at Dec. 31, 2020				31,705,088
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		213,978				213,978
Other comprehensive income (loss)		7,252					7,252
Preferred stock dividends	[1]	(9,671)				(9,671)
Redemption of preferred stock (shares)			(3,300,000)
Redemption of preferred stock		(79,677)	$ (79,677)
Loss on Redemption of Preferred Stock		(2,820)				(2,820)
Sale of non-controlling interest in BMT	[2]	31,893			31,893
Distribution of investment in BM Technologies	[3]	(32,983)				(32,983)
Restricted stock awards to certain BMT team members	[4]	19,592			19,592
Share-based compensation expense		11,162			11,162
Issuance of common stock under share-based compensation arrangements (shares)				832,888
Issuance of common stock under share-based compensation arrangements		8,487		$ 832	7,655
Ending balance, preferred stock (shares) at Sep. 30, 2021			5,700,000
Ending balance at Sep. 30, 2021		1,284,299	$ 137,794	$ 33,818	525,894	607,085	1,488	(21,780)
Ending balance, common stock (shares) at Sep. 30, 2021				32,537,976
Beginning balance, preferred stock (shares) at Jun. 30, 2021			9,000,000
Beginning balance at Jun. 30, 2021		1,250,729	$ 217,471	$ 33,634	519,294	496,844	5,266	(21,780)
Beginning balance, common stock (shares) at Jun. 30, 2021				32,353,256
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		116,042				116,042
Other comprehensive income (loss)		(3,778)					(3,778)
Preferred stock dividends	[5]	(2,981)				(2,981)
Redemption of preferred stock (shares)			(3,300,000)
Redemption of preferred stock		(79,677)	$ (79,677)
Loss on Redemption of Preferred Stock		(2,820)				(2,820)
Share-based compensation expense		3,289			3,289
Issuance of common stock under share-based compensation arrangements (shares)				184,720
Issuance of common stock under share-based compensation arrangements		3,495		$ 184	3,311
Ending balance, preferred stock (shares) at Sep. 30, 2021			5,700,000
Ending balance at Sep. 30, 2021		$ 1,284,299	$ 137,794	$ 33,818	525,894	607,085	1,488	(21,780)
Ending balance, common stock (shares) at Sep. 30, 2021				32,537,976
Beginning balance, preferred stock (shares) at Dec. 31, 2021		5,700,000	5,700,000
Beginning balance at Dec. 31, 2021		$ 1,366,217	$ 137,794	$ 34,722	542,391	705,732	(4,980)	(49,442)
Beginning balance, common stock (shares) at Dec. 31, 2021		32,913,267		32,913,267
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 199,323				199,323
Other comprehensive income (loss)		(151,146)					(151,146)
Preferred stock dividends	[1]	(6,544)				(6,544)
Share-based compensation expense		10,657			10,657
Issuance of common stock under share-based compensation arrangements (shares)				226,380
Issuance of common stock under share-based compensation arrangements		$ (3,756)		$ 226	(3,982)
Repurchase of common shares (in shares)		(664,145)		(664,145)
Repurchase of common shares		$ (27,820)						(27,820)
Ending balance, preferred stock (shares) at Sep. 30, 2022		5,700,000	5,700,000
Ending balance at Sep. 30, 2022		$ 1,386,931	$ 137,794	$ 34,948	549,066	898,511	(156,126)	(77,262)
Ending balance, common stock (shares) at Sep. 30, 2022		32,475,502		32,475,502
Beginning balance, preferred stock (shares) at Jun. 30, 2022			5,700,000
Beginning balance at Jun. 30, 2022		$ 1,353,390	$ 137,794	$ 34,922	545,670	837,147	(124,881)	(77,262)
Beginning balance, common stock (shares) at Jun. 30, 2022				32,449,486
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		63,912				63,912
Other comprehensive income (loss)		(31,245)					(31,245)
Preferred stock dividends	[5]	(2,548)				(2,548)
Share-based compensation expense		3,336			3,336
Issuance of common stock under share-based compensation arrangements (shares)				26,016
Issuance of common stock under share-based compensation arrangements		$ 86		$ 26	60
Ending balance, preferred stock (shares) at Sep. 30, 2022		5,700,000	5,700,000
Ending balance at Sep. 30, 2022		$ 1,386,931	$ 137,794	$ 34,948	$ 549,066	$ 898,511	$ (156,126)	$ (77,262)
Ending balance, common stock (shares) at Sep. 30, 2022		32,475,502		32,475,502

[1] Dividends per share of $1.160316 and $1.088391 were declared on Series E and F preferred stock, respectively, for the nine months ended September 30, 2022. Dividends per share of $1.041346, $1.075982, $1.142234, and $1.125 were declared on Series C, D, E, and F preferred stock, respectively, for the nine months ended September 30, 2021.(2)Refer to NOTE 12 – SHAREHOLDERS' EQUITY for additional information about the redemption of Series C and Series D Preferred Stock.

[2] Refer to NOTE 3 – DISCONTINUED OPERATIONS for additional information about the sale of non-controlling interest in BMT including the reverse recapitalization of MFAC

[3] Immediately after the closing of the BMT divestiture, Customers distributed all of its remaining investment in BM Technologies' common stock to its shareholders as special dividends, equivalent to 0.15389 of BM Technologies common stock for each share of Customers common stock. Refer to NOTE 3 – DISCONTINUED OPERATIONS.

[4] At the closing of the BMT divestiture, certain team members of BMT received restricted stock awards in BM Technologies' common stock. Refer to NOTE 3 – DISCONTINUED OPERATIONS.

[5] Dividends per share of $0.445233 and $0.421083 were declared on Series E and F preferred stock, respectively, for the three months ended September 30, 2022. Dividends per share of $0.346206, $0.332790, $0.335984, and $0.375 were declared on Series C, D, E, and F preferred stock, respectively, for the three months ended September 30, 2021.(2)Refer to NOTE 12 – SHAREHOLDERS' EQUITY for additional information about the redemption of Series C and Series D Preferred Stock.