Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities
Net income	$ 51.7	$ 56.4	$ 44.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29.3	18.8	21.7
Net accretion of acquired lease contracts	0.0	(1.1)	(2.2)
Loss on sale of equipment	0.0	0.0	0.2
Net equity in earnings of unconsolidated entities (net of distributions)	(0.4)	(0.4)	(8.5)
Gain on sale of equity method investment in unconsolidated entity	0.0	(10.1)	0.0
Net gain on sale of a business	0.0	0.0	(0.1)
Amortization of debt issuance costs	0.5	0.7	0.7
Amortization of original discount on borrowings	0.4	0.5	0.5
Non-cash stock-based compensation	4.9	3.1	3.1
Provision for losses on accounts receivable	1.1	1.5	0.7
Deferred income taxes	4.2	1.3	1.8
Changes in operating assets and liabilities
Notes and accounts receivable	(12.7)	(16.7)	(2.6)
Prepaid expenses and other	(6.9)	0.1	(1.8)
Other assets	(4.8)	2.1	(2.3)
Accounts payable	5.2	0.8	(7.2)
Accrued liabilities	3.5	13.9	(3.3)
Net cash provided by operating activities	76.0	70.9	45.2
Investing activities
Purchase of leasehold improvements and equipment	(10.2)	(8.9)	(6.8)
Proceeds from sale of equipment and contract terminations	0.3	0.2	0.8
Cash received from sale of a business, net of cash disposed	0.0	0.0	0.6
Proceeds from sale of equity method investee's sale of assets	0.0	19.3	8.4
Cost of contracts purchased	(2.6)	(1.1)	(0.7)
Acquisition of business, net of cash acquired	0.0	(277.9)	0.0
Net cash (used in) provided by investing activities	(12.5)	(268.4)	2.3
Financing activities
Proceeds from credit facility revolver	455.6	333.5	386.6
Payments on credit facility revolver	(470.6)	(186.3)	(410.1)
Proceeds from credit facility term loan	0.0	225.0	0.0
Payments on credit facility term loan	(11.3)	(150.0)	(20.0)
Payments of debt issuance costs and original discount on borrowings	0.0	(3.2)	0.0
Payments on other long-term borrowings	(2.3)	(0.5)	(0.5)
Distribution to noncontrolling interest	(3.2)	(3.3)	(3.2)
Repurchase of common stock	(47.6)	0.0	0.0
Net cash (used in) provided by financing activities	(79.4)	215.2	(47.2)
Effect of exchange rate changes on cash and cash equivalents	0.1	(0.6)	0.3
(Decrease) increase in cash and cash equivalents	(15.8)	17.1	0.6
Cash and cash equivalents at beginning of year	39.9	22.8	22.2
Cash and cash equivalents at end of year	24.1	39.9	22.8
Cash paid during the period for
Interest	17.9	8.5	8.0
Income taxes, net	$ 15.3	$ 15.3	$ 26.5