COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 13, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Credit Agreement [Abstract]
2016		$ 15,026
2017		5,276
2018		6,984
2019		31,581
2020		0
Thereafter		0
Credit agreement, Total		58,867
Less amount representing interest		(14,214)
Credit agreement net of interest		44,653
Operating Leases [Abstract]
2016		19,013
2017		17,226
2018		15,898
2019		13,641
2020		10,002
Thereafter		17,858
Operating Leases, Total		93,638
Less amount representing interest		0
Operating leases net of interest		93,638
Capital Leases [Abstract]
2016		422
2017		422
2018		422
2019		422
2020		422
Thereafter		4,998
Capital Leases, Total		7,108
Less amount representing interest		(3,209)
Capital leases net of interest		3,899
Finance obligation excluded from scheduled maturities		9,700
Termination fee		2,800
Lease rent expense		11,700	$ 11,900	$ 12,000
Interest expense related to financing obligations		1,600	$ 1,600	$ 1,500
Settlement amount	$ 850,000
Debt forgiveness	$ 165,000
Outstanding net loan commitment		24,800
Future employment contract commitments		3,000
Surety bonds		$ 14,900