Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 19,873	$ 1,797	$ 28,165	$ 30,902
Currency translation adjustment, net of tax	(8,196)	3,190	(3,374)	(11,413)
Comprehensive income	11,677	4,987	24,791	19,489
Less: Net income allocated to noncontrolling interests	0	0	0	0
Comprehensive income allocated to common stockholders	$ 11,677	$ 4,987	$ 24,791	$ 19,489