Investment in Variable Interest Entity - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
Dec. 31, 2015 |
|
| Variable Interest Entity [Line Items] | |||
| Earnings (loss) in equity of unconsolidated affiliate | $ 0.0 | $ 0.1 | |
| Trade receivables | 1.5 | ||
| Allowance for bad debts against trade receivables | 5.4 | $ 5.2 | |
| Other assets | $ 0.0 | 0.0 | |
| PHIC's date of incorporation | May 26, 2011 | ||
| PHI Century Limited [Member] | |||
| Variable Interest Entity [Line Items] | |||
| Investment in the common stock | 49.00% | ||
| Allowance for Trade Receivables [Member] | |||
| Variable Interest Entity [Line Items] | |||
| Allowance for bad debts against trade receivables | $ 1.5 | ||