Long Term Debt (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt including current portion	$ 144,300,000	$ 46,900,000
Current portion of long-term obligations	(12,277,000)	(13,904,000)
Total	132,000,000	33,000,000
Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
Long-term debt including current portion	105,000,000	0
Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt including current portion	39,000,000	45,000,000
Promissory Notes [Member]
Debt Instrument [Line Items]
Long-term debt including current portion	$ 300,000	$ 1,900,000