Derivatives - Summary of Activities Related to Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Mar. 31, 2016
Designated as Hedging Instrument \| Cross currency swaps
Derivatives, Fair Value [Line Items]
Other comprehensive income tax	$ 2,600
Other assets, net \| Designated as Hedging Instrument \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities) at fair value	6,210	$ 129
Other assets, net \| Designated as Hedging Instrument \| Cross currency swaps
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities) at fair value	64,083	50,846
Other assets, net \| Derivatives Not Designated as Hedging \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities) at fair value	5,194	2,405
Other assets, net \| Derivatives Not Designated as Hedging \| Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities) at fair value	21,383	4,130
Accumulated other comprehensive (income) \| Designated as Hedging Instrument \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive (income) loss, fair value	(6,210)	(129)
Accumulated other comprehensive (income) \| Designated as Hedging Instrument \| Cross currency swaps
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive (income) loss, fair value	$ 1,202	$ 9,585

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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