Summary of Significant Accounting Policies - Schedule of Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred tax valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 68,419	$ 53,116	$ 46,905
Charged to Income	0	15,303	6,211
Charged to Other Accounts	0	0	0
Deductions From Reserves Credited to Income	(8,843)	0	0
Balance at End of Year	59,576	68,419	53,116
Investment valuation allowances [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	1,350	1,350	1,350
Charged to Income	0	0	0
Charged to Other Accounts	0	0	0
Deductions From Reserves Credited to Income	0	0	0
Balance at End of Year	1,350	1,350	1,350
VAT receivable valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	0
Charged to Income	2,792
Charged to Other Accounts	0
Deductions From Reserves Credited to Income	0
Balance at End of Year	$ 2,792