Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Effective tax rate	13.00%		17.00%	15.00%	17.00%
Expected tax rate	15.00%	19.00%	17.00%	15.00%	17.00%
US Statutory rate				35.00%
U.S. foreign tax credit						$ 5,058
Foreign loss carryforwards						5,093
Other Foreign Deductible carryforwards						3,898
Expiry Date of other deductible carryforwards						2016-2020
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance for deferred tax assets						2,399
2015 [Member]
Operating Loss Carryforwards [Line Items]
Foreign tax credit carryforwards expire amount						944
2023 [Member]
Operating Loss Carryforwards [Line Items]
Foreign tax credit carryforwards expire amount						$ 4,114