Subsequent Events	12 Months Ended
	Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn December 15, 2020, the Company entered into a definitive agreement with Catalyst Holdings Limited (“Catalyst”), an affiliate of investment funds managed by Apollo Global Management, Inc. (together with its consolidated subsidiaries, “Apollo”), and Hudson Executive Capital LP to be acquired for $35.00 per share in cash. The agreement was subject to the satisfaction of customary closing conditions, including approval by Cardtronics shareholders and receipt of regulatory approvals. As of December 31, 2020, the Company had incurred $8.8 million of costs related to the proposed transaction, including investment banking, legal and professional fees, and certain other administrative expenses presented in the Acquisition related expenses line on the Consolidated Statements of Operations.As discussed elsewhere in this 2020 Form 10-K, on January 25, 2021, the Company entered into an Acquisition Agreement (the “Acquisition Agreement”), with NCR Corporation (“NCR”), pursuant to which NCR has agreed to acquire the Company for $39.00 per share, subject to the terms and conditions of the Acquisition Agreement (such transaction, the “Acquisition”). It is expected that, subject to the terms and conditions of the Acquisition Agreement, the proposed transaction will be completed in mid-year 2021. Prior to entering into the Acquisition Agreement, the Company delivered to Catalyst a written notice terminating the agreement with Apollo, pursuant to the terms of that agreement. In connection with the termination of the agreement with Apollo, NCR has paid, on behalf of the Company, a termination fee of $32.6 million to Apollo in accordance with the terms of the Company's agreement with Apollo. If the Acquisition Agreement is terminated under certain circumstances, the Company will be required to reimburse NCR for such termination fee payment.