FAIR VALUE MEASUREMENTS - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	$ 12,527,000	$ 18,511,000
Debt obligations, carrying amount	1,431,043,000	1,356,084,000
Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Maximum contingent liability if financial performance measures were fully met	16,000,000
Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	12,527,000	18,511,000
Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	0	0
Debt obligations, fair value	1,410,000,000	1,390,000,000
Current Liabilities [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	$ 9,200,000