Investment in Variable Interest Entity - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Variable Interest Entity [Line Items]
PHIC's date of incorporation			May 26, 2011
Loss in equity of unconsolidated affiliate	$ 100,000	$ 600,000	$ 100,000	$ 1,100,000
Trade receivables	4,700,000		4,700,000		3,500,000
Accrued and other current liabilities	48,545,000		48,545,000		54,531,000
Other assets	0		0		0
PHI Century Limited [Member]
Variable Interest Entity [Line Items]
Investment in the common stock			49.00%
Accrued and other current liabilities	$ 1,800,000		$ 1,800,000		$ 1,900,000