Acquisitions - Franchisee Acquisition (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Jan. 01, 2018	Mar. 31, 2019	Dec. 31, 2018
Estimated Fair Value of Identifiable Assets Acquired and Liabilities Assumed
Goodwill		$ 734,558	$ 733,170
Franchisee Acquisitions
Business Acquisition [Line Items]
Purchase Price	$ 189,826	189,826	189,826
Add: Settlement of Pre-existing Relationship		5,405	5,405
Working Capital Adjustment		155	155
Consideration Transferred		195,386	195,386
Estimated Fair Value of Identifiable Assets Acquired and Liabilities Assumed
Cash and Cash Equivalents		50	43
Lease Merchandise		59,616	59,616
Property, Plant and Equipment		5,568	5,568
Other Intangibles		24,498	24,530
Prepaid Expenses and Other Assets		1,206	1,168
Total Identifiable Assets Acquired		90,938	90,925
Accounts Payable and Accrued Expenses		(910)	(852)
Customer Deposits and Advance Payments		(5,156)	(5,156)
Total Liabilities Assumed		(6,066)	(6,008)
Goodwill		110,514	110,469
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		$ 84,872	84,917
Acquisition Accounting Adjustments
Cash and Cash Equivalents			7
Lease Merchandise			0
Property, Plant and Equipment			0
Other Intangibles			(32)
Prepaid Expenses and Other Assets			38
Total Identifiable Assets Acquired			13
Accounts Payable and Accrued Expenses			(58)
Customer Deposits and Advance Payments			0
Total Liabilities Assumed			58
Goodwill			45
Net Assets Acquired			$ (45)