Related Parties - Amounts Receivable from and Payable to Related Parties (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Amounts receivables from related parties	$ 530	$ 7,920
Amounts payables to related parties	11,952	5,031
LFCM Holdings [Member]
Related Party Transaction [Line Items]
Amounts receivables from related parties	139	7,794
Amounts payables to related parties	11,754	4,300
Other [Member]
Related Party Transaction [Line Items]
Amounts receivables from related parties	391	126
Amounts payables to related parties	$ 198	$ 731