PENSIONS AND OTHER BENEFITS - Transition from providing retirement benefits under defined pension plan to defined contribution 401(K) plan (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in projected benefit obligation
Service cost		$ 404	$ 343
Interest cost	255	358	383
Transition from defined pension plan to defined contribution 401(k) plan
Change in projected benefit obligation
Benefit obligation at beginning of year	6,039	7,949	6,639
Actuarial loss/ (gain)	(860)	1,012	1,073
Service cost		404	343
Interest cost	255	358	383
Curtailments and settlements		(3,586)
Benefits paid	(184)	(98)	(489)
Benefit obligation at end of year	5,250	6,039	7,949
Change in plan assets
Plan assets at estimated fair value at beginning of year	6,019	6,164	5,668
Actual return on plan assets	1,033	720	97
Contributions by employer		129	888
Curtailments and settlements		(896)
Benefits paid	(184)	(98)	(489)
Fair value of plan assets at end of year	6,868	6,019	6,164
Funded status and recognized asset (liability) included in other assets (liabilities) on the balance sheet	$ 1,618	$ (20)	$ (1,785)