SUMMARY OF SIGNIFICANT COMPONENTS OF THE COMPANY'S DEFERRED TAX ASSETS AMD LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current tax assets:
Operating reserves	$ 7,159	$ 5,971
Deferred revenue	2,976	2,697
Accrued workers' compensation	2,891	2,811
Other	1,826	1,425
Total current	14,852	12,904
Current tax liabilities:
Prepaid expenses	(3,936)	(5,282)
Other	0	0
Total current	(3,936)	(5,282)
Current tax assets (liabilities):
Operating reserves	7,159	5,971
Deferred revenue	2,976	2,697
Prepaid expenses	(3,936)	(5,282)
Accrued workers' compensation	2,891	2,811
Other	1,826	1,425
Total current	10,916	7,622
Non-current tax assets:
Fixed assets	16,900	17,631
Stock compensation	3,344	1,977
Net operating loss and credit carryforwards	11,825	9,421
Long-term rent liabilities	8,438	7,836
Deferred Revenue	3,775	5,070
Other	5,256	7,121
Valuation allowance	(2,915)	(1,144)
Total non-current	46,623	47,912
Non-current tax liabilities:
Intangibles	(331,157)	(327,675)
Convertible senior notes	(16,599)	0
Total non-current	(347,756)	(327,675)
Non-current tax assets (liabilities):
Intangibles	(331,157)	(327,675)
Fixed assets	16,900	17,631
Stock compensation	3,344	1,977
Net operating loss and credit carryforwards	11,825	9,421
Long-term rent liabilities	8,438	7,836
Deferred Revenue	3,775	5,070
Convertible senior notes	(16,599)	0
Other	5,256	7,121
Total non-current	(301,133)	(279,763)
Total deferred tax assets	61,475	60,816
Total deferred tax liabilities	(351,692)	(332,957)
Total net deferred taxes	$ (290,217)	$ (272,141)