CORPORATE OFFICE RELOCATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Summary of relocation expenses incurred and to be paid in future periods
Balance at the beginning of the period	$ 3,311	$ 7,101
Expenses incurred		376
Amounts paid	(139)	(1,907)
Balance at the end of the period	3,172	5,570
Employee Separation
Summary of relocation expenses incurred and to be paid in future periods
Balance at the beginning of the period	226	1,895
Expenses incurred		36
Amounts paid	(35)	(926)
Balance at the end of the period	191	1,005
Other Relocation
Summary of relocation expenses incurred and to be paid in future periods
Expenses incurred		340
Amounts paid		(340)
Lease Termination
Summary of relocation expenses incurred and to be paid in future periods
Balance at the beginning of the period	3,085	5,206
Amounts paid	(104)	(641)
Balance at the end of the period	$ 2,981	$ 4,565