CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 89,646	$ 91,622
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	39,722	37,297
Amortization of intangible assets	13,237	11,263
Amortization of debt issuance costs	1,124	1,263
Deferred income taxes	4,857	1,314
Non-cash stock compensation expense	9,177	8,226
Gain on sale of property, equipment and real estate	(1,839)	(3,435)
Other non-cash adjustments	2,314	686
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(24,068)	(59,768)
Inventories, net	(494)	(41,883)
Accounts payable	68,456	29,897
Other assets and liabilities	(3,715)	34,156
Net cash provided by operating activities	198,417	110,638
Cash flows from investing activities
Purchases of businesses, net of cash acquired	(85,780)	(20,970)
Purchases of property, equipment and real estate	(67,582)	(42,704)
Proceeds from sale of property, equipment and real estate	4,444	10,968
Insurance proceeds	107	1,991
Net cash used in investing activities	(148,811)	(50,715)
Cash flows from financing activities
Proceeds from revolving line of credit	110,987	713,264
Repayments of proceeds from revolving line of credit	(110,987)	(717,726)
Repurchases of common stock under share repurchase program	(16,446)	0
Payments on finance lease obligations	(5,094)
Payments on finance lease obligations		(5,937)
Principal payments on other notes	0	(75)
Other financing activities, net	(5,530)	(3,508)
Net cash used in financing activities	(27,070)	(13,982)
Net increase in cash and cash equivalents	22,536	45,941
Cash and cash equivalents
Beginning of period	150,723	11,750
End of period	173,259	57,691
Supplemental disclosure of non-cash investing and financing transactions
Acquisition-related holdback payments due at future date	5,478	1,403
Acquisition-related post-closing adjustment receivable	$ 951	0
Assets acquired under capital lease obligations		$ 821

Change in balance due from seller related to customary post-closing adjustments.

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