SHAREHOLDERS' EQUITY (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		6 Months Ended
	Mar. 06, 2017	Mar. 31, 2017	Jan. 18, 2017	Jun. 30, 2017	Jun. 30, 2016
Proceeds from Issuance of Common Stock				$ 88,656	$ 0
Payments For Capital Contribution		$ 110,000
Underwritten Public Offering [Member]
Shares Issued, Price Per Share	$ 46.50
Stock Issued During Period, Shares, New Issues	2,012,500
Proceeds from Issuance of Common Stock	$ 88,700
Public Offering Deduction Amount	$ 4,900
US Premium Financing Holding Company [Member]
Stock Issued During Period, Shares, Purchase of Assets			128,572	128,572
Shares Issued, Price Per Share			$ 45.45
Stock Issued During Period, Value, Purchase of Assets			$ 5,800	$ 5,844
Cost Method Investments Ownership Percentage			4.99%