Basis of Condensed Consolidated Financial Statements (Details) $ / shares in Units, $ in Thousands, NZD in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) customer $ / shares	Mar. 31, 2015 USD ($) customer $ / shares	Mar. 31, 2016 NZD customer	Jan. 31, 2016	Dec. 31, 2015 USD ($)
Earnings Per Share, Diluted | $ / shares	$ 0.31	$ 0.32
Earnings Per Share, Basic | $ / shares	$ 0.31	$ 0.33
Marketable securities	$ 23,346				$ 22,709
Mandatorily redeemable noncontrolling interests	0				18,981
Escrow deposit	5,400,000				340,300
Reserves Incorrect Disposition Of Assets	19,700				21,200
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	12,455				2,219
Deferred Tax Liabilities, Net, Noncurrent	$ 25,308				$ 107,249
Minimum [Member]
Escrow deposits, period held by the Company (in business days)	2 days
Maximum [Member]
Escrow deposits, period held by the Company (in business days)	5 days
Restatement Adjustment [Member]
Interest Expense		$ 5,200
Interest Expense Net		$ 3,100
Earnings Per Share, Diluted | $ / shares		$ 0.03
Earnings Per Share, Basic | $ / shares		$ 0.03
PIQ Acquisition [Member]
Mandatorily redeemable noncontrolling interests	$ 19,000		NZD 27.8
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage	40.00%		40.00%	40.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Number Of Customers | customer	2	0	2
Ten Largest Clients [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage	43.00%	20.00%
Client A [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage	14.00%
Client B [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage	12.00%