GOODWILL AND OTHER INTANGIBLE ASSETS - Amortizable Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets
Indefinite-lived intangible assets	$ 450
Gross Amount	16,790	$ 4,590
Accumulated Amortization	4,654	3,372
Net Amount	12,136	1,218
Amortization expense	$ 1,281	735	$ 901
Customer List
Intangible Assets
Estimated useful lives	8 years
Gross Amount	$ 3,400	3,400
Accumulated Amortization	2,861	2,499
Net Amount	$ 539	901
Tradename
Intangible Assets
Estimated useful lives	5 years
Gross Amount	$ 1,190	1,190
Accumulated Amortization	1,111	873
Net Amount	$ 79	$ 317
Customer relationships
Intangible Assets
Estimated useful lives	10 years
Acquired estimated useful lives	10 years
Gross Amount	$ 12,200
Accumulated Amortization	682
Net Amount	$ 11,518