SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 55,524	$ 53,241
Land
Property, Plant and Equipment [Line Items]
Total property and equipment	8,231	7,999
Buildings
Property, Plant and Equipment [Line Items]
Total property and equipment	41,119	37,451
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	4,711	3,954
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	1,463	2,452
Airplane
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 0	$ 1,385