Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operations
Net Income	$ 91,332	$ 87,686	$ 81,274
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	43,242	39,151	36,944
Deferred income taxes	4,173	4,096	(3,441)
Net (gains) losses on disposal of property	(5,918)	24	418
Net income attributable to noncontrolling interests	(264)	(258)	(211)
Changes in assets and liabilities:
Trade receivables	(3,409)	(100,473)	(52,813)
Merchandise inventory	(54,080)	(12,753)	(31,633)
Other current assets	10,698	(18,424)	13,134
Other non-current assets	(149)	(1,008)	(1,653)
Trade accounts payable	36,011	111,172	42,208
Accrued payroll and benefit costs	(16,783)	33,929	(15,988)
Other current liabilities	(14,596)	(6,198)	11,927
Other non-current liabilities	6,596	(1,195)	10,722
Total adjustments to net income	5,521	48,063	9,614
Net cash provided by operations	96,853	135,749	90,888
Cash Flows from Investing Activities
Proceeds from disposal of property	15,701	1,398	447
Capital expenditures for property	(74,179)	(52,495)	(58,223)
Acquisition of business, net of cash acquired	(18,093)	0	0
Net cash used by investing activities	(76,571)	(51,097)	(57,776)
Cash Flows from Financing Activities
Net increase (decrease) in short-term borrowings	38,636	(16,100)	11,326
Repayment of long-term debt	(3,656)	(1,800)	(7,386)
Principal payments under capital leases	(4,704)	(3,277)	(3,067)
Sales of common stock	15,723	14,492	12,839
Purchases of treasury stock	(14,365)	(15,060)	(12,772)
Sales of noncontrolling interests’ common stock	401	0	488
Purchases of noncontrolling interests’ common stock	(109)	(318)	(148)
Dividends paid	(48,035)	(63,496)	(37,401)
Net cash used by financing activities	(16,109)	(85,559)	(36,121)
Net Increase (Decrease) in Cash	4,173	(907)	(3,009)
Cash, Beginning of Year	33,758	34,665	37,674
Cash, End of Year	37,931	33,758	34,665
Non-cash Investing and Financing Activities:
Acquisitions of equipment under capital leases	7,354	10,430	3,632
Acquisition of software and maintenance under financing arrangement	0	7,309	0
Cash Paid During the Year for:
Interest, net of amounts capitalized	2,024	1,448	1,508
Income taxes, net of refunds	$ 52,076	$ 64,752	$ 44,676