Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 12,335	$ 10,987
Adjustments to reconcile net income to net cash provided by operations
Depreciation and amortization	16,284	14,885
Net accretion of acquired lease contracts	(715)	(801)
Net loss on sale and abandonment of assets	118	244
Amortization of debt issuance costs	488	674
Amortization of original discount on borrowings	349	590
Write-off of debt issuance costs and original discount on borrowings	634	115
Non-cash stock-based compensation	2,133	1,941
Provisions for losses on accounts receivable	191	469
Excess tax benefit related to vesting of restricted stock units		87
Deferred income taxes	(6,288)	(6,804)
Net change in operating assets and liabilities	(15,355)	667
Net cash provided by operating activities	10,174	23,054
Investing activities
Purchase of leasehold improvements and equipment	(4,197)	(8,149)
Cost of contracts purchased	(2,686)	(662)
Proceeds from sale of assets	216	146
Capitalized interest		(17)
Contingent payments for a business acquired		(260)
Net cash used in investing activities	(6,667)	(8,942)
Financing activities
Tax benefit from vesting of restricted stock units		(87)
Contingent payments for businesses acquired	(57)	(141)
Proceeds from Senior Credit Facility and Restated Credit Facility revolver, net	2,300	6,800
Proceeds (payments) from Senior Credit Facility and Restated Credit Facility term loan, net	2,455	(19,190)
Payments of debt issuance costs for Restated Credit Facility	(888)
Distribution to noncontrolling interest	(1,209)	(1,372)
Redemption of convertible debentures	(68)
Borrowings (payments) on other long-term debt obligations	(155)	214
Net cash provided by (used in) financing activities	2,378	(13,776)
Effect of exchange rate changes on cash and cash equivalents	(295)	57
Increase in cash and cash equivalents	5,590	393
Cash and cash equivalents at beginning of period	18,196	23,158
Cash and cash equivalents at end of period	23,786	23,551
Cash paid (received) during the period for
Interest	5,788	7,168
Income taxes, net	$ 9,212	$ (3,139)