FAIR VALUE MEASUREMENTS - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	$ 17,482,000	$ 12,527,000
Debt obligations, carrying amount	1,370,378,000	1,431,043,000
Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Maximum contingent liability if financial performance measures were fully met	25,800,000
Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	17,482,000	12,527,000
Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	0	0
Debt obligations, fair value	1,370,000,000	1,410,000,000
Current Liabilities [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration liabilities	$ 14,200,000