BUSINESS COMBINATIONS - Schedule of Purchase Price Paid for Acquisitions (Detail) - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Apr. 30, 2014
Purchase Price:
Cash used in acquisitions, net of cash acquired	$ 360	$ 2,839	$ 0	$ 8,305
Total
Excess purchase price to be allocated to goodwill	119,170	119,899	118,976	119,139
Gain on settlement of acquisition related contingent consideration	0	0	0	1,058
BBI Acquisition
Purchase Price:
Cash used in acquisitions, net of cash acquired	314	2,439	0	7,860
Other non-cash considerations	0	0	0	555
Contingent consideration and holdbacks	67	400	0	1,653
Total
Total	381	2,839	0	10,068
Current assets	0	40	0	814
Land	0	353	0	0
Buildings	0	1,360	0	0
Equipment	99	269	0	2,010
Other liabilities, net	0	(106)	0	(241)
Intangible assets	251	0	0	4,302
Fair value of assets acquired and liabilities assumed	350	1,916	0	6,885
Excess purchase price to be allocated to goodwill	$ 31	$ 923	$ 0	$ 3,183