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LEASES - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 01, 2019
Lessee Lease Description [Line Items]
Operating lease right-of-use assets	$ 11,553,000		$ 12,132,000	$ 7,900,000
Operating lease liabilities	$ 11,852,000		$ 12,423,000	$ 8,200,000
Weighted average discount rate	3.07%		3.05%
Weighted average lease term	6 years 2 months 4 days		6 years 3 months 29 days
Operating lease costs	$ 827,000	$ 624,000
Variable lease costs	$ 89,000	$ 73,000
Minimum [Member]
Lessee Lease Description [Line Items]
Remaining lease term	2 months		5 months
Maximum [Member]
Lessee Lease Description [Line Items]
Remaining lease term	17 years		17 years

X

- Definition

Operating lease, remaining lease term.

+ References

No definition available.

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+ References

No definition available.

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- Definition

Weighted average discount rate for operating lease calculated at point in time.

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-Publisher FASB
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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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