CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 17,907	$ 29,558
Adjustments to reconcile net income to net cash provided by operating activities:
Impairment charges	6,700
Depreciation and amortization of property and equipment	21,726	16,730
Amortization of intangible assets	9,558	5,233
Accretion of closure and post-closure obligations	3,208	1,675
Unrealized foreign currency loss	2,740	1,453
Deferred income taxes	(4,015)	2,407
Share-based compensation expense	1,736	869
Unrecognized tax benefits		(424)
Net loss on disposal of property and equipment	935	86
Amortization of debt discount	111	37
Changes in assets and liabilities (net of effect of business acquisition):
Receivables	7,221	(20,938)
Income taxes receivable	6,560	(17)
Other assets	1,785	(3,219)
Accounts payable and accrued liabilities	(5,256)	2,449
Deferred revenue	(5,371)	391
Accrued salaries and benefits	(1,877)	(1,949)
Income taxes payable	(2,317)	(2,281)
Closure and post-closure obligations	(4,386)	(879)
Net cash provided by operating activities	56,965	31,181
Cash flows from investing activities:
Purchases of property and equipment	(25,693)	(17,910)
Purchases of restricted cash and investments	(848)	(40)
Proceeds from sale of restricted cash and investments	804	662
Proceeds from sale of property and equipment	404	120
Business acquisition (net of cash acquired)		(465,895)
Net cash used in investing activities	(25,333)	(483,063)
Cash flows from financing activities:
Payments on long-term debt	(34,848)	(1,038)
Dividends paid	(11,700)	(11,640)
Proceeds from revolving credit facility	9,379
Payments on revolving credit facility	(9,379)
Proceeds from exercise of stock options	1,664	1,445
Proceeds from issuance of long-term debt		413,962
Deferred financing costs paid		(14,001)
Other	7	204
Net cash (used in) provided by financing activities	(44,877)	388,932
Effect of foreign exchange rate changes on cash	(376)	(69)
Decrease in cash and cash equivalents	(13,621)	(63,019)
Cash and cash equivalents at beginning of period	22,971	73,940
Cash and cash equivalents at end of period	9,350	10,921
Supplemental Disclosures
Income taxes paid, net of receipts	18,723	17,494
Interest paid	14,406	4,145
Non-cash investing and financing activities:
Closure and post-closure retirement asset		2,863
Capital expenditures in accounts payable	3,420	2,378
Restricted stock issued from treasury shares	$ 292	$ 546