Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 37,777	$ 50,047
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	38,089	36,257
Asset impairments		259
Amortization of debt issuance costs and other non-cash interest	891	783
Deferred income taxes	837	1,867
Non-cash revenue and other income	(4,318)	(5,371)
Non-cash equity compensation	3,486	4,086
Other expenses and non-cash items	1,939	831
Changes in assets and liabilities, net:
Accounts receivable, prepaid expenses and other assets	41,249	22,002
Accounts payable, accrued expenses and other liabilities	(12,394)	(19,785)
Income taxes payable	923	515
Net cash provided by operating activities	108,479	91,491
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for facility development and expansions	(3,447)	(6,417)
Expenditures for other capital improvements	(17,285)	(8,173)
Acquisitions, net of cash acquired	(48,461)	(7,062)
Proceeds from sale of assets	48	77
(Increase) decrease in other assets	(705)	1,561
Payments received on direct financing lease and notes receivable		684
Net cash used in investing activities	(69,850)	(19,330)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of debt and borrowings from credit facility	89,500	60,000
Scheduled principal repayments	(2,691)	(2,500)
Other principal repayments of debt	(66,000)	(72,000)
Payment of debt issuance and other refinancing and related costs	(844)	(65)
Payment of lease obligations	(746)	(553)
Dividends paid	(51,106)	(51,462)
Purchase and retirement of common stock	(2,525)	(5,089)
Proceeds from exercise of stock options		4,961
Net cash used in financing activities	(34,412)	(66,708)
NET INCREASE IN CASH AND CASH EQUIVALENTS	4,217	5,453
CASH AND CASH EQUIVALENTS, beginning of period	52,183	37,711
CASH AND CASH EQUIVALENTS, end of period	56,400	43,164
Cash paid during the period for:
Interest (net of amounts capitalized of $0 in both 2018 and 2017)	3,278	$ 10,899
Income taxes paid	$ 105

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