REVOLVING CREDIT FACILITY REVOLVING CREDIT FACILITY (Details)	Oct. 22, 2015 USD ($)
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, current borrowing capacity	$ 125,000,000.0
Revolving Credit Facility, term	5 years
Revolving Credit Facility, conditional increase to borrowing capacity	$ 50,000,000.0
Revolving Credit Facility, collateral, percent of assets	100.00%
Revolving Credit Facility, collateral, percent of equity	100.00%
Revolving Credit Facility, letter of credit fronting fee percentage	0.125%
Fees and expense paid to lenders at closing	$ 1,200,000
Swingline Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, current borrowing capacity	10,000,000.0
Letters of Credit [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, current borrowing capacity	$ 10,000,000.0
Federal Funds Effective Swap Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, basis spread on variable rate	0.50%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, basis spread on variable rate	1.00%
Minimum | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, unused capacity, commitment fee percentage	0.25%
Revolving Credit Facility, letter of credit participation fee percentage	2.00%
Minimum | London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, basis spread on variable rate	2.00%
Minimum | Base Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, basis spread on variable rate	1.00%
Maximum | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, unused capacity, commitment fee percentage	0.50%
Revolving Credit Facility, letter of credit participation fee percentage	3.00%
Maximum | London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, basis spread on variable rate	3.00%
Maximum | Base Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, basis spread on variable rate	2.00%