CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 8,003	$ 16,226
Adjustments to reconcile net income to net cash provided by operating activities:
Impairment charges	6,700
Depreciation and amortization of property and equipment	15,135	8,412
Amortization of intangible assets	6,606	1,215
Accretion of closure and post-closure obligations	2,077	716
Unrealized foreign currency loss	1,510	323
Deferred income taxes	(3,096)	2,095
Share-based compensation expense	1,089	525
Unrecognized tax benefits		7
Net loss on disposal of property and equipment	908	19
Amortization of debt discount	74
Changes in assets and liabilities (net of effect of business acquisition):
Receivables	16,952	4,661
Income taxes receivable	6,328	(3,426)
Other assets	3,374	(418)
Accounts payable and accrued liabilities	(6,241)	(2,347)
Deferred revenue	(6,089)	(2,349)
Accrued salaries and benefits	(1,651)	(1,772)
Income taxes payable	839	(3,024)
Closure and post-closure obligations	(2,136)	(364)
Net cash provided by operating activities	50,382	20,499
Cash flows from investing activities:
Purchases of property and equipment	(19,376)	(8,658)
Purchases of restricted cash and investments	(840)	(30)
Proceeds from sale of restricted cash and investments	817
Proceeds from sale of property and equipment	314	19
Business acquisition (net of cash acquired)		(465,895)
Net cash used in investing activities	(19,085)	(474,564)
Cash flows from financing activities:
Payments on long-term debt	(33,935)
Dividends paid	(7,792)	(7,750)
Proceeds from exercise of stock options	1,042	1,420
Proceeds from issuance of long-term debt		413,962
Deferred financing costs paid		(14,001)
Other	(262)	205
Net cash (used in) provided by financing activities	(40,947)	393,836
Effect of foreign exchange rate changes on cash	(244)	86
Decrease in cash and cash equivalents	(9,894)	(60,143)
Cash and cash equivalents at beginning of period	22,971	73,940
Cash and cash equivalents at end of period	13,077	13,797
Supplemental Disclosures
Income taxes paid, net of receipts	7,994	13,281
Interest paid	9,864	124
Non-cash investing and financing activities:
Closure and post-closure retirement asset		2,863
Capital expenditures in accounts payable	1,804	1,328
Restricted stock issued from treasury shares	$ 272	$ 279