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Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2016

Accounting Policies [Abstract]

Awards outstanding [Table Text Block]

The following table presents the number of shares or units outstanding for each award type as of June 30, 2016 and December 31, 2015, respectively, (in thousands):

Award type		June 30, 2016			December 31, 2015
Stock options		827			829
Restricted stock units (time based)		2,442			1,915
Restricted stock units (performance based)		—			24
Stock appreciation rights		522			522
Market stock units		464			563

Market Stock Units Valuation Assumptions [Table Text Block]

The weighted average assumptions used to value the MSUs granted during the three and six months ended June 30, 2016 were as follows:

		June 30, 2016
Volatility		44.06%
Risk-free interest rate		1.04%
Expected option life in years		2.93
Dividend yield		—

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Schedule of awards outstanding for each share-based compansation award type.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of Market Stock Units which are performance-based awards that vest based upon the Company's relative shareholder return.

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