CONTINGENCIES - Condensed Shareholder's Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Common Class A [Member]	Dec. 31, 2013 Common Class A [Member]	Mar. 31, 2014 Common Class B [Member]	Dec. 31, 2013 Common Class B [Member]	Mar. 31, 2014 Additional Paid In Capital [Member]	Dec. 31, 2013 Additional Paid In Capital [Member]	Mar. 31, 2014 Retained Earnings [Member]	Dec. 31, 2013 Retained Earnings [Member]	Mar. 31, 2014 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 31, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 31, 2012 Accumulated Other Comprehensive Income (Loss) [Member]
Condensed Financial Statements, Captions [Line Items]
Opening Balance VALUE	$ 298,393	$ 269,494	$ 269,494	$ 313	$ 312	$ 72	$ 72	$ 604,721	$ 601,847	$ (306,713)	$ (332,737)	$ 0	$ 0	$ 0
Opening Balance SHARES				31,308,194	31,226,047	7,197,532	7,197,532
Net income (loss)	1,363	(251)	26,024		0		0		0	1,363	26,024
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures	3		41		0		0	3	41		0
Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures				663,163	96,560		0
Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures	1,205		4,229	7	1		0	1,198	4,228		0
Purchase of vested employee restricted stock units	(890)	(610)	(1,640)	(1)	(2)		0	(889)	(1,638)		0
Purchase of vested employee restricted stock units SHARES				(90,990)	(186,038)		0
Forfeitures of dividend equivalents VALUE			0		0		0		0		0
Exercise of stock options SHARES	15,750			15,750	171,625		0
Exercise of stock options VALUE	26		245	0	2		0	26	243
Ending Balance SHARES				31,896,117	31,308,194	7,197,532	7,197,532
Ending Balance VALUE	$ 300,100		$ 298,393	$ 319	$ 313	$ 72	$ 72	$ 605,059	$ 604,721	$ (305,350)	$ (306,713)	$ 0	$ 0	$ 0