DEBT - Consolidated Net Leverage Ratio (Details) - Credit Agreement [Member]	6 Months Ended
	Jun. 30, 2017
Covenant Term 1 [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage	0.25%
Covenant Term 1 [Member] | Eurodollar Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	1.75%
Covenant Term 1 [Member] | LIBOR Index Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	1.75%
Covenant Term 1 [Member] | Letter of Credit Fee [Member]
Line of Credit Facility [Line Items]
Interest margin	1.75%
Covenant Term 1 [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	0.75%
Covenant Term 1 [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	1.50
Covenant Term 2 [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage	0.30%
Covenant Term 2 [Member] | Eurodollar Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.00%
Covenant Term 2 [Member] | LIBOR Index Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.00%
Covenant Term 2 [Member] | Letter of Credit Fee [Member]
Line of Credit Facility [Line Items]
Interest margin	2.00%
Covenant Term 2 [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	1.00%
Covenant Term 2 [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	1.50
Covenant Term 2 [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	2.00
Covenant Term 3 [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage	0.30%
Covenant Term 3 [Member] | Eurodollar Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.25%
Covenant Term 3 [Member] | LIBOR Index Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.25%
Covenant Term 3 [Member] | Letter of Credit Fee [Member]
Line of Credit Facility [Line Items]
Interest margin	2.25%
Covenant Term 3 [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	1.25%
Covenant Term 3 [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	2.00
Covenant Term 3 [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	2.50
Covenant Term 4 [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage	0.35%
Covenant Term 4 [Member] | Eurodollar Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.50%
Covenant Term 4 [Member] | LIBOR Index Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.50%
Covenant Term 4 [Member] | Letter of Credit Fee [Member]
Line of Credit Facility [Line Items]
Interest margin	2.50%
Covenant Term 4 [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	1.50%
Covenant Term 4 [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	2.50
Covenant Term 4 [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	3.00
Covenant Term 5 [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage	0.40%
Covenant Term 5 [Member] | Eurodollar Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.75%
Covenant Term 5 [Member] | LIBOR Index Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	2.75%
Covenant Term 5 [Member] | Letter of Credit Fee [Member]
Line of Credit Facility [Line Items]
Interest margin	2.75%
Covenant Term 5 [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest margin	1.75%
Covenant Term 5 [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	3.00