DERIVATIVES DERIVATIVES - Outstanding Swap Contracts (Details) - USD ($) $ in Millions		Nov. 02, 2019	Jun. 28, 2019	Jun. 10, 2019	Apr. 02, 2019	Mar. 21, 2019	Jan. 24, 2019	Jan. 23, 2019	Jan. 11, 2019	Nov. 30, 2018	Nov. 16, 2018	Oct. 26, 2018	Jun. 24, 2016	Jun. 09, 2016	Mar. 31, 2015	Jan. 23, 2015
Derivative [Line Items]
Derivative, Notional Amount		$ 2,197.5
Interest Rate Swap 1
Derivative [Line Items]
Derivative, Notional Amount	[1]	25.0
Derivative, forward interest rate	[1]													1.065%
Interest Rate Swap 2
Derivative [Line Items]
Derivative, Notional Amount	[2]	25.0
Derivative, forward interest rate	[2]												0.926%
Interest Rate Swap 3
Derivative [Line Items]
Derivative, Notional Amount	[3]	58.5
Derivative, forward interest rate	[3]															1.795%
Interest Rate Swap 4
Derivative [Line Items]
Derivative, Notional Amount	[4]	39.0
Derivative, forward interest rate	[4]														1.795%
Interest Rate Swap 5
Derivative [Line Items]
Derivative, Notional Amount	[5]	100.0
Derivative, forward interest rate	[5]											2.824%
Interest Rate Swap 6
Derivative [Line Items]
Derivative, Notional Amount	[5]	100.0
Derivative, forward interest rate	[5]											2.8915%
Interest Rate Swap 7
Derivative [Line Items]
Derivative, Notional Amount	[5]	100.0
Derivative, forward interest rate	[5]											2.921%
Interest Rate Swap 8
Derivative [Line Items]
Derivative, Notional Amount	[5]	50.0
Derivative, forward interest rate	[5]											2.955%
Interest Rate Swap 9
Derivative [Line Items]
Derivative, Notional Amount	[6]	150.0
Derivative, forward interest rate	[6]										2.895%
Interest Rate Swap 10
Derivative [Line Items]
Derivative, Notional Amount	[6]	50.0
Derivative, forward interest rate	[6]										2.958%
Interest Rate Swap 11
Derivative [Line Items]
Derivative, Notional Amount	[6]	50.0
Derivative, forward interest rate	[6]										2.959%
Interest Rate Swap 12
Derivative [Line Items]
Derivative, Notional Amount	[7]	100.0
Derivative, forward interest rate	[7]									2.8084%
Interest Rate Swap 13
Derivative [Line Items]
Derivative, Notional Amount	[7]	50.0
Derivative, forward interest rate	[7]									2.8315%
Interest Rate Swap 14
Derivative [Line Items]
Derivative, Notional Amount	[7]	100.0
Derivative, forward interest rate	[7]									2.848%
Interest Rate Swap 15
Derivative [Line Items]
Derivative, Notional Amount	[8]	50.0
Derivative, forward interest rate	[8]								2.4678%
Interest Rate Swap 16
Derivative [Line Items]
Derivative, Notional Amount	[8]	100.0
Derivative, forward interest rate	[8]								2.477%
Interest Rate Swap 17
Derivative [Line Items]
Derivative, Notional Amount	[8]	100.0
Derivative, forward interest rate	[8]								2.501%
Interest Rate Swap 18
Derivative [Line Items]
Derivative, Notional Amount	[9]	50.0
Derivative, forward interest rate	[9]								2.55%
Interest Rate Swap 19
Derivative [Line Items]
Derivative, Notional Amount	[9]	50.0
Derivative, forward interest rate	[9]								2.5255%
Interest Rate Swap 20
Derivative [Line Items]
Derivative, Notional Amount	[9]	50.0
Derivative, forward interest rate	[9]							2.5292%
Interest Rate Swap 21
Derivative [Line Items]
Derivative, Notional Amount	[9]	100.0
Derivative, forward interest rate	[9]							2.542%
Interest Rate Swap 22
Derivative [Line Items]
Derivative, Notional Amount	[10]	50.0
Derivative, forward interest rate	[10]						2.521%
Interest Rate Swap 23
Derivative [Line Items]
Derivative, Notional Amount	[10]	50.0
Derivative, forward interest rate	[10]						2.5558%
Interest Rate Swap 24
Derivative [Line Items]
Derivative, Notional Amount	[11]	100.0
Derivative, forward interest rate	[11]					2.3645%
Interest Rate Swap 25
Derivative [Line Items]
Derivative, Notional Amount	[12]	100.0
Derivative, forward interest rate	[12]					2.4925%
Interest Rate Swap 26
Derivative [Line Items]
Derivative, Notional Amount	[12]	100.0
Derivative, forward interest rate	[12]					2.449%
Interest Rate Swap 27
Derivative [Line Items]
Derivative, Notional Amount	[13]	100.0
Derivative, forward interest rate	[13]				2.252%
Interest Rate Swap 28
Derivative [Line Items]
Derivative, Notional Amount	[13]	100.0
Derivative, forward interest rate	[13]				2.217%
Interest Rate Swap 29
Derivative [Line Items]
Derivative, Notional Amount	[14]	50.0
Derivative, forward interest rate	[14]			2.229%
Interest Rate Swap 30
Derivative [Line Items]
Derivative, Notional Amount	[15]	$ 50.0
Derivative, forward interest rate	[15]		2.184%
Interest rate swap
Derivative [Line Items]
Derivative, Notional Amount															$ 84.0	$ 140.0
Quarterly notional principal reduction															$ 1.0	$ 1.5

[1] This swap was executed on June 7, 2016 with an effective date of June 9, 2016.

[2] This swap was executed on June 24, 2016 with an effective date of June 24, 2016.

[3] This swap contract was executed on January 23, 2015 with an effective date of August 3, 2015. On March 31, 2015, the Company amended the original contract to reduce the beginning notional principal amount from $140 million to $84 million. The swap contract has an amortizing notional principal amount which is reduced by $1.5 million on a quarterly basis.

[4] This swap was executed on March 31, 2015 with an effective date of August 3, 2015. The swap contract has an amortizing notional principal amount which is reduced by $1.0 million on a quarterly basis.

[5] This swap contract was executed on October 26, 2018 with an effective date of October 26, 2018.

[6] This swap contract was executed on November 16, 2018 with an effective date of November 16, 2018

[7] This swap contract was executed on November 30, 2018 with an effective date of November 30, 2018.

[8] This swap contract was executed on January 11, 2019 with an effective date of January 11, 2019.

[9] This swap contract was executed on January 23, 2019 with an effective date of January 23, 2019.

[10] This swap contract was executed on January 24, 2019 with an effective date of January 24, 2019.

[11] This swap contract was executed on March 18, 2019 with an effective date of March 21, 2019.

[12] This swap contract was executed on March 21, 2019 with an effective date of March 21, 2019.

[13] This swap contract was executed on April 2, 2019 with an effective date of April 2, 2019.

[14] This swap contract was executed on April 2, 2019 with an effective date of June 10, 2019.

[15] This swap contract was executed on April 2, 2019 with an effective date of June 28, 2019.