Condensed Consolidated Unaudited Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 251,369	$ 247,527
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,983	16,500
Share-based compensation	11,992	11,769
Non-cash contribution to 401(k) plan	4,274	2,945
Deferred income tax provision	2,765	3,925
Other income from investment in unconsolidated entity	(7,939)	(8,491)
Other, net	1,260	927
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(102,813)	(126,181)
Inventories	(74,448)	(50,566)
Accounts payable and other liabilities	99,627	(23,286)
Other, net	(6,539)	(5,004)
Net cash provided by operating activities	197,531	70,065
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(47,343)	(5,828)
Capital expenditures	(14,007)	(12,897)
Investment in unconsolidated entity	(4,940)	(3,760)
Proceeds from sale of property and equipment	1,295	143
Net cash used in investing activities	(64,995)	(22,342)
Cash flows from financing activities:
Dividends on Common and Class B common stock	(180,454)	(154,951)
Purchase of additional ownership from non-controlling interest	(32,400)
Repurchases of common stock to satisfy employee withholding tax obligations	(1,528)	(3,782)
Net repayments of other long-term obligations	(920)	(182)
Distributions to non-controlling interest		(2,178)
Proceeds from non-controlling interest for investment in unconsolidated entity	988	752
Net proceeds from issuances of common stock	7,480	5,979
Proceeds from non-controlling interest for investment in Peirce-Phelps, Inc.	17,000
Net proceeds under revolving credit agreement	34,100	94,600
Net cash used in financing activities	(155,734)	(59,762)
Effect of foreign exchange rate changes on cash and cash equivalents	454	(845)
Net decrease in cash and cash equivalents	(22,744)	(12,884)
Cash and cash equivalents at beginning of period	82,894	80,496
Cash and cash equivalents at end of period	60,150	67,612
Peirce-Phelps, Inc.
Supplemental cash flow information:
Common stock issued	58,638
Dunphey & Associates Supply Co., Inc.
Supplemental cash flow information:
Common stock issued	$ 7,450
Alert Labs Inc
Supplemental cash flow information:
Common stock issued		$ 8,180