SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	6 Months Ended
	Jul. 28, 2015	Jul. 01, 2015	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2015
SUBSEQUENT EVENT
Dividend paid in cash				$ 7,792	$ 7,750
Goodwill impairment charges			$ 6,700	6,700
Allstate | Forecast
SUBSEQUENT EVENT
Cash consideration						$ 58,000
Subsequent event
SUBSEQUENT EVENT
Quarterly dividend declared (in dollars per share)		$ 0.18
Dividend paid in cash	$ 3,900
Subsequent event | Allstate | Forecast
SUBSEQUENT EVENT
Cash consideration						$ 58,000
Field & Industrial Services
SUBSEQUENT EVENT
Goodwill impairment charges			$ 6,700	$ 6,700
Goodwill impairment charge per diluted share			$ 0.31