LEASE COMMITMENTS - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Maturities of operating lease liabilities:
Year 1	$ 19,652
Year 2	15,411
Year 3	10,740
Year 4	9,365
Year 5	6,998
Thereafter	22,331
Total lease payments	84,497
Less imputed interest	(12,643)
Total operating lease liabilities	71,854
Maturities of finance lease liabilities:
Year 1	5,655
Year 2	4,787
Year 3	3,870
Year 4	3,099
Year 5	2,658
Thereafter	18,051
Total lease payments	38,120	$ 10,894
Less imputed interest	(8,168)
Total finance lease liabilities	29,952
Future minimum payments under noncancelable operating leases, by year and in the aggregate
Year 1		26,512
Year 2		21,386
Year 3		16,529
Year 4		12,549
Year 5		10,225
Thereafter		21,932
Total lease payments		109,133
Future minimum payments under capital leases, by year and in the aggregate
Year 1		1,828
Year 2		1,653
Year 3		1,546
Year 4		1,160
Year 5		880
Thereafter		3,827
Less imputed interest		(2,541)
Present value of future minimum lease payments		$ 8,353
Amount of additional operating and finance leases that have not yet commenced	$ 1,800
Minimum
Future minimum payments under capital leases, by year and in the aggregate
Term of operating and finance leases that have not yet commenced	3 years
Maximum
Future minimum payments under capital leases, by year and in the aggregate
Term of operating and finance leases that have not yet commenced	10 years