Acquisitions - Fair Value of Assets and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jul. 27, 2017	Mar. 31, 2018	Dec. 31, 2017
Estimated Fair Value of Identifiable Assets Acquired and Liabilities Assumed
Goodwill		$ 625,706	$ 622,948
SEI
Business Acquisition [Line Items]
Purchase Price	$ 140,000
Settlement of Pre-existing Accounts Receivable SEI owed Aaron's, Inc.	3,452
Reimbursement for Insurance Costs	(100)
Working Capital Adjustment	188
Consideration Transferred	143,540
Estimated Fair Value of Identifiable Assets Acquired and Liabilities Assumed
Cash and Cash Equivalents	34
Receivables	1,448
Lease Merchandise	40,941
Property, Plant and Equipment	8,832
Other Intangibles	13,779
Prepaid Expenses and Other Assets	440
Total Identifiable Assets Acquired	65,474
Accounts Payable and Accrued Expenses	(6,698)
Customer Deposits and Advance Payments	(2,500)
Capital Leases	(4,514)
Total Liabilities Assumed	(13,712)
Goodwill	91,778
Net Assets Acquired	51,762
Amounts Recognized as of Acquisition Date | SEI
Business Acquisition [Line Items]
Purchase Price	140,000
Settlement of Pre-existing Accounts Receivable SEI owed Aaron's, Inc.	3,452
Reimbursement for Insurance Costs	(100)
Working Capital Adjustment	188
Consideration Transferred	143,540
Estimated Fair Value of Identifiable Assets Acquired and Liabilities Assumed
Cash and Cash Equivalents	34
Receivables	1,448
Lease Merchandise	40,941
Property, Plant and Equipment	8,832
Other Intangibles	13,578
Prepaid Expenses and Other Assets	440
Total Identifiable Assets Acquired	65,273
Accounts Payable and Accrued Expenses	(6,534)
Customer Deposits and Advance Payments	(2,500)
Capital Leases	(4,514)
Total Liabilities Assumed	(13,548)
Goodwill	91,815
Net Assets Acquired	51,725
Acquisition Accounting Adjustments | SEI
Business Acquisition [Line Items]
Acquisition Accounting Adjustments, Settlement of Pre-existing Accounts Receivable SEI owed Aaron's, Inc.	0
Acquisition Accounting Adjustments, Reimbursement for Insurance Costs	0
Acquisition Accounting Adjustments, Working Capital Adjustment	0
Acquisition Accounting Adjustments, Consideration Transferred	0
Estimated Fair Value of Identifiable Assets Acquired and Liabilities Assumed
Acquisition Accounting Adjustments, Cash and Cash Equivalents	0
Acquisition Accounting Adjustments, Receivables	0
Acquisition Accounting Adjustments, Lease Merchandise	0
Acquisition Accounting Adjustments, Property, Plant and Equipment	0
Acquisition Accounting Adjustments, Other Intangibles	201
Acquisition Accounting Adjustments, Prepaid Expenses and Other Assets	0
Acquisition Accounting Adjustments, Total Identifiable Assets Acquired	201
Acquisition Accounting Adjustments, Accounts Payable and Accrued Expenses	(164)
Acquisition Accounting Adjustments, Customer Deposits and Advance Payments	0
Acquisition Accounting Adjustments, Capital Leases	0
Acquisition Accounting Adjustments, Total Liabilities Assumed	(164)
Goodwill	(37)
Net Assets Acquired	$ 37