PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Details 1) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Pension Benefits [Member] USD ($)	Dec. 31, 2012 Pension Benefits [Member] GBP (£)	Dec. 31, 2011 Pension Benefits [Member] USD ($)	Dec. 31, 2010 Pension Benefits [Member] USD ($)	Dec. 31, 2012 Other Benefits [Member] USD ($)	Dec. 31, 2011 Other Benefits [Member] USD ($)	Dec. 31, 2010 Other Benefits [Member] USD ($)
Change in benefit obligation:
Benefit obligation at beginning of year	$ 46,854		$ 42,460		$ 6,395	$ 5,402
Cost of benefits earned (service cost)	0		0	0	195	226	223
Interest cost on benefit obligation	2,032		2,171	2,212	237	292	295
Amendments	0		0		(3,012)	0
Actuarial losses	4,374		4,445		804	599
Benefits paid	(2,238)		(2,222)		(153)	(124)
Benefit obligation at year end	51,022		46,854	42,460	4,466	6,395	5,402
Change in plan assets:
Fair value of plan assets at beginning of year	28,897		30,329		0	0
Actual return on plan assets	3,161		(634)		0	0
Employer contributions	1,545	4,896	1,348		0	0
Benefits paid	(2,211)		(2,146)		0	0
Fair value of plan assets at year end	31,392		28,897	30,329	0	0	0
Unfunded status at December 31	$ (19,630)		$ (17,957)		$ (4,466)	$ (6,395)