STOCK BASED COMPENSATION (Details) (USD $)	6 Months Ended					1 Months Ended		3 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended		1 Months Ended		3 Months Ended			1 Months Ended	3 Months Ended	1 Months Ended			1 Months Ended		1 Months Ended		3 Months Ended	1 Months Ended	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Minimum	Jun. 30, 2012 Maximum	Jun. 30, 2012 Leland O. Erdahl	Mar. 31, 2012 Restricted stock President/CEO	Jan. 31, 2011 Restricted stock President/CEO	Mar. 31, 2011 Restricted stock President/CEO	Jun. 30, 2012 Restricted stock President/CEO	Mar. 31, 2012 Restricted stock Executive officers Long Term Incentive Plan	Jun. 30, 2012 Restricted stock Executive officers Long Term Incentive Plan	Mar. 30, 2012 Restricted stock Executive officers Long Term Incentive Plan item	Jun. 30, 2012 Restricted stock Non-employee directors Amended 2004 Directors' Plan	Jun. 30, 2011 Restricted stock Non-employee directors Amended 2004 Directors' Plan	Jun. 30, 2012 Restricted stock Non-employee directors Amended 2004 Directors' Plan	Jun. 04, 2012 Restricted stock Non-employee directors Amended 2004 Directors' Plan item	Jun. 07, 2011 Restricted stock Non-employee directors Amended 2004 Directors' Plan item	Jun. 30, 2012 Restricted stock Executive Chairman 2007 Restricted Stock Plan	Jun. 30, 2012 Restricted stock Executive Chairman 2007 Restricted Stock Plan	Jun. 30, 2011 Restricted stock Executive Chairman 2004 Stock Incentive Plan	Jun. 30, 2011 Stock option Non-employee directors Amended 2004 Directors' Plan	Jun. 07, 2011 Stock option Non-employee directors Amended 2004 Directors' Plan item	Jun. 30, 2011 Stock option Executive Chairman 2004 Stock Incentive Plan	Jun. 30, 2012 Restricted shares and stock options Amended 2004 Directors' Plan	Jun. 30, 2012 Restricted shares and stock options Non-employee directors Amended 2004 Directors' Plan	Jun. 30, 2011 Restricted shares and stock options Non-employee directors Amended 2004 Directors' Plan	Jun. 30, 2011 Restricted shares and stock options Non-employee directors Amended 2004 Directors' Plan	Jun. 30, 2011 Restricted shares and stock options Executive Chairman 2004 Stock Incentive Plan	Jun. 30, 2011 Restricted shares and stock options Executive Chairman 2004 Stock Incentive Plan
Stock Compensation Expense
Stock compensation expense	$ 312,000	$ 580,000			$ 23,000			$ 140,000	$ 92,000		$ 3,000				$ 6,000				$ 1,900								$ 3,600		$ 1,200
Number of individuals who were granted shares												4				3	3					3
Restricted stock granted (in shares)						100,571	42,553			56,700			50,000	33,333				50,000		33,333
Available shares for future stock option and restricted share grants																								1,206,250
Stock options granted (in shares)																					16,667		16,667
Rate at which shares vest (as a percent)																		25.00%							25.00%	25.00%		25.00%
Number of shares available for future grants	2,414,291
Total estimated unrecognized compensation cost	$ 387,000
Weighted average vesting period over which compensation cost is expected to be recognized			1 year	3 years