Investment in Variable Interest Entity - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Variable Interest Entity [Line Items]
PHIC's date of incorporation	May 26, 2011
Loss in equity of unconsolidated affiliate		$ 500,000
Trade receivables	3,500,000
Accrued and other current liabilities	38,489,000		54,531,000
Other assets	0		0
Maximum [Member]
Variable Interest Entity [Line Items]
Loss in equity of unconsolidated affiliate	100,000
PHI Century Limited [Member]
Variable Interest Entity [Line Items]
Investment in the common stock	49.00%
Accrued and other current liabilities	$ 1,900,000