CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 18,599	$ 26,569
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	21,007	18,561
Amortization of intangible assets	7,586	7,907
Accretion of closure and post-closure obligations	3,245	3,081
Gain on disposition of business		(2,035)
Unrealized foreign currency gain	(1,500)	(381)
Deferred income taxes	(1,011)	(2,832)
Share-based compensation expense	2,954	2,182
Net (gain) loss on disposition of assets	287	(228)
Amortization and write-off of debt issuance costs	5,806	1,583
Amortization and write-off of debt discount	667	111
Changes in assets and liabilities:
Receivables	(20,142)	8,713
Income taxes receivable	1,592	1,102
Other assets	(2,638)	395
Accounts payable and accrued liabilities	6,174	(6,560)
Deferred revenue	4,228	(1,942)
Accrued salaries and benefits	2,676	126
Income taxes payable	1,112	63
Closure and post-closure obligations	(1,277)	(32)
Net cash provided by operating activities	49,365	56,383
Cash flows from investing activities:
Purchases of property and equipment	(26,354)	(22,550)
Deposits on Vernon acquisition		(5,049)
Business acquisition (net of cash acquired)		(4,934)
Purchases of restricted cash and investments	(832)	(1,040)
Proceeds from divestitures (net of cash divested)		2,723
Proceeds from sale of restricted cash and investments	807	978
Proceeds from sale of property and equipment	957	524
Net cash used in investing activities	(25,422)	(29,348)
Cash flows from financing activities:
Payments on long-term debt	(287,040)	(17,326)
Proceeds from long-term debt	281,000
Payment on short-term borrowings	(13,438)	(30,546)
Proceeds from short-term borrowings	11,260	32,849
Dividends paid	(11,778)	(11,754)
Proceeds from exercise of stock options	1,050	229
Payment of equipment financing obligations	(268)
Other	(121)	(188)
Deferred financing costs paid	(2,967)
Net cash used in financing activities	(22,302)	(26,736)
Effect of foreign exchange rate changes on cash	588	95
Increase in cash and cash equivalents	2,229	394
Cash and cash equivalents at beginning of period	7,015	5,989
Cash and cash equivalents at end of period	9,244	6,383
Supplemental Disclosures
Income taxes paid, net of receipts	9,274	18,600
Interest paid	8,981	11,430
Non-cash investing and financing activities:
Capital expenditures in accounts payable	1,044	3,855
Restricted stock issued from treasury shares	$ 113	$ 415