LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Long-term debt obligations
Long-term debt	$ 125,823	$ 112,845
Less current portion	40,088	31,513
Long-term debt, less current portion	85,735	81,332
Payments under long-term debt obligations
Due in one year or less	42,012
Due after one year through two years	34,025
Due after two years through three years	53,895
Due after three years through four years	224
Due after four years through five years	231
Due after five years	78
Total payments	130,465
Less amounts representing interest	4,642
Long-term debt	125,823	112,845
Term Loan
Long-term debt obligations
Long-term debt	73,750	83,750
Interest rate (as a percent)	1.40%
Payments under long-term debt obligations
Due in one year or less	16,670
Due after one year through two years	18,759
Due after two years through three years	41,481
Total payments	76,910
Less amounts representing interest	3,160
Long-term debt	73,750	83,750
Notes payable
Long-term debt obligations
Long-term debt	49,387	22,082
Weighted-average interest rate (as a percent)	2.10%
Payments under long-term debt obligations
Due in one year or less	24,328
Due after one year through two years	14,109
Due after two years through three years	12,197
Total payments	50,634
Less amounts representing interest	1,247
Long-term debt	49,387	22,082
Capital lease obligations
Long-term debt obligations
Long-term debt	2,686	7,013
Weighted-average interest rate (as a percent)	5.00%
Payments under long-term debt obligations
Due in one year or less	1,014
Due after one year through two years	1,157
Due after two years through three years	217
Due after three years through four years	224
Due after four years through five years	231
Due after five years	78
Total payments	2,921
Less amounts representing interest	235
Long-term debt	$ 2,686	$ 7,013