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Equity Incentive Plans and Stock-Based Compensation - Information About Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended				3 Months Ended		12 Months Ended
	Mar. 31, 2017	Feb. 28, 2017	Oct. 31, 2016	Feb. 29, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options granted						$ 1,603
Weighted-average fair value of options granted (in dollars per share)						$ 2.38
Intrinsic value of options exercised					$ 4,708	$ 421
MSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							40,000	540,000
Vested in period (in shares)					0
Number of consecutive trading days					20 days
Measurement period (in years)					4 years
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	395,383		60,641	547,000
Vesting percentage	25.00%			25.00%
Actual performance vesting percentage				80.00%
Vested in period (in shares)		100,000		400,000	0
PSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.00%
PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	150.00%

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Share-based Compensation Arrangement by Share-based Payment Award, Consecutive Trading Days

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Percentage of vesting of share-based compensation awards.

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-Paragraph 2
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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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