RETIREMENT AND DEFERRED COMPENSATION PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Domestic Plans
Components of net periodic benefit cost:
Service cost	$ 2,504	$ 2,010	$ 5,008	$ 4,021
Interest cost	1,589	1,482	3,178	2,964
Expected return on plan assets	(1,897)	(1,646)	(3,795)	(3,292)
Amortization of net loss	1,351	717	2,702	1,434
Net periodic benefit cost	3,547	2,563	7,093	5,127
Minimum funding requirement			0
Expected contribution in current fiscal year			10,000
Employer contributions			0
Foreign Plans
Components of net periodic benefit cost:
Service cost	1,139	1,081	2,299	2,160
Interest cost	412	699	832	1,398
Expected return on plan assets	(447)	(510)	(902)	(1,020)
Amortization of net loss	418	313	843	626
Amortization of prior service cost	64	80	129	161
Net periodic benefit cost	$ 1,586	$ 1,663	3,201	$ 3,325
Expected contribution in current fiscal year			12,600
Employer contributions			$ 1,000