CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 26,569	$ 17,907
Adjustments to reconcile net income to net cash provided by operating activities:
Impairment charges		6,700
Depreciation and amortization of property and equipment	18,561	21,726
Amortization of intangible assets	7,907	9,558
Accretion of closure and post-closure obligations	3,081	3,208
Gain on disposition of business	(2,035)
Unrealized foreign currency (gain) loss	(381)	2,740
Deferred income taxes	(2,832)	(4,015)
Share-based compensation expense	2,182	1,736
Net (gain) loss on disposal of property and equipment	(228)	935
Amortization of debt issuance costs	1,583	1,501
Amortization of debt discount	111	111
Changes in assets and liabilities:
Receivables	8,713	7,221
Income taxes receivable	1,102	6,560
Other assets	395	284
Accounts payable and accrued liabilities	(6,560)	(5,256)
Deferred revenue	(1,942)	(5,371)
Accrued salaries and benefits	126	(1,877)
Income taxes payable	63	(2,317)
Closure and post-closure obligations	(32)	(4,386)
Net cash provided by operating activities	56,383	56,965
Cash flows from investing activities:
Purchases of property and equipment	(22,550)	(25,693)
Deposits on Vernon acquisition	(5,049)
Business acquisition (net of cash acquired)	(4,934)
Purchases of restricted cash and investments	(1,040)	(848)
Proceeds from divestitures (net of cash divested)	2,723
Proceeds from sale of restricted cash and investments	978	804
Proceeds from sale of property and equipment	524	404
Net cash used in investing activities	(29,348)	(25,333)
Cash flows from financing activities:
Payments on long-term debt and capital lease obligations	(17,326)	(34,848)
Dividends paid	(11,754)	(11,700)
Payments on revolving credit facility	(30,546)	(9,379)
Proceeds from revolving credit facility	32,849	9,379
Proceeds from exercise of stock options	229	1,664
Other	(188)	7
Net cash used in financing activities	(26,736)	(44,877)
Effect of foreign exchange rate changes on cash	95	(376)
Increase (decrease) in cash and cash equivalents	394	(13,621)
Cash and cash equivalents at beginning of period	5,989	22,971
Cash and cash equivalents at end of period	6,383	9,350
Supplemental Disclosures
Income taxes paid, net of receipts	18,600	18,723
Interest paid	11,430	14,406
Non-cash investing and financing activities:
Capital expenditures in accounts payable	3,855	3,420
Acquisition of equipment with financing arrangements	1,239
Restricted stock issued from treasury shares	$ 415	$ 292