LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Long-term debt obligations
Long-term debt	$ 53,546	$ 56,658
Less current portion	15,386	14,001
Long-term debt, less current portion	38,160	42,657
Future minimum payments under long-term debt obligations
Due in one year or less	17,340
Due after one year through two years	22,137
Due after two years through three years	12,362
Due after three years through four years	2,555
Due after four years through five years	2,433
Due after five years	803
Total minimum payments	57,630
Less amounts representing interest	4,084
Present value of net minimum payments included in long-term debt	53,546	56,658
Capital lease obligations
Long-term debt obligations
Long-term debt	51,552	56,658
Future minimum payments under long-term debt obligations
Due in one year or less	16,700
Due after one year through two years	21,439
Due after two years through three years	11,664
Due after three years through four years	2,496
Due after four years through five years	2,433
Due after five years	803
Total minimum payments	55,535
Less amounts representing interest	3,983
Present value of net minimum payments included in long-term debt	51,552	56,658
Note payable
Long-term debt obligations
Long-term debt	1,994
Future minimum payments under long-term debt obligations
Due in one year or less	640
Due after one year through two years	698
Due after two years through three years	698
Due after three years through four years	59
Total minimum payments	2,095
Less amounts representing interest	101
Present value of net minimum payments included in long-term debt	$ 1,994