Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Organization And Summary Of Significant Accounting Policies [Line Items]
Remeasurement of Foreign Currency		$ 10,000,000
Remeasurement of Foreign currency, After tax		6,600,000
Impairment of goodwill and indefinite lived intangible assets	$ 0	0	$ 0
Goodwill and other intangible assets	6,807,000	$ 7,013,000
Changes in the carrying value of the goodwill and indefinite lived intangible assets	$ 200,000
Minimum
Organization And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum
Organization And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Leasehold Improvements | Minimum
Organization And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Leasehold Improvements | Maximum
Organization And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Syndicate 1221
Organization And Summary Of Significant Accounting Policies [Line Items]
Percentage control of stamp capacity	100.00%