Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net income	$ 6,364	$ 5,813
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of property and equipment	6,552	5,443
Amortization of intangibles	6,416	2,479
Amortization of deferred financing costs and debt discount	102	77
Provision for doubtful accounts	1,231	521
Write-off of debt issuance costs		286
Gain on sale of property and equipment	(107)	(79)
Noncash stock compensation	480	536
Deferred income taxes		708
Changes in assets and liabilities, excluding effects of acquisitions
Accounts receivable	(3,200)	(3,045)
Inventories	(894)	(1,364)
Other assets	(722)	1,619
Accounts payable	(1,781)	3,557
Income taxes payable/receivable	3,106	284
Other liabilities	(1,873)	2,992
Net cash provided by operating activities	15,674	19,827
Cash flows from investing activities
Purchases of property and equipment	(7,776)	(6,503)
Acquisitions of businesses, net of cash acquired of $247 and $0, respectively	(106,873)	(8,797)
Proceeds from sale of property and equipment	203	190
Other	(550)
Net cash used in investing activities	(114,996)	(15,110)
Cash flows from financing activities
Proceeds from term loan under credit agreement applicable to respective period (Note 4)		100,000
Payments on term loan under credit agreement applicable to respective period (Note 4)	(1,250)	(48,125)
Proceeds from delayed draw term loan under credit agreement applicable to respective period (Note 4)	112,500
Payments on delayed draw term loan under credit agreement applicable to respective period (Note 4)		(50,000)
Proceeds from vehicle and equipment notes payable	4,331	4,933
Debt issuance costs	(833)	(1,228)
Principal payments on long term debt	(2,117)	(1,119)
Principal payments on capital lease obligations	(1,882)	(2,348)
Acquisition-related obligations	(1,248)	(1,112)
Surrender of common stock awards by employees	(54)	(836)
Net cash provided by financing activities	109,447	165
Net change in cash	10,125	4,882
Cash at beginning of period	14,482	6,818
Cash at end of period	24,607	11,700
Supplemental disclosures of cash flow information Net cash paid during the period for:
Interest	2,044	1,155
Income taxes, net of refunds	650	2,398
Supplemental disclosure of noncash investing and financing activities
Common stock issued for acquisition of business	10,859
Vehicles capitalized under capital leases and related lease obligations	816	1,247
Seller obligations in connection with acquisition of businesses	2,503	1,052
Unpaid purchases of property and equipment included in accounts payable	$ 609	$ 0