Noncontrolling Interest - Redeemable Noncontrolling Interests (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Redeemable Noncontrolling Interest [Roll Forward]
Balance, beginning of period	$ 18,729	$ 21,662
Net income (loss) attributable to redeemable non-controlling interest	198	(401)
Currency translation adjustment	(2,337)	(2,532)
Ending balance	$ 16,590	$ 18,729

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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