Equity Awards - Equity Awards Narrative (Details)	Dec. 31, 2016 shares
Director Retainer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Approved for Issuance	100,000
2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible Ratio	1.75
Shares Approved for Issuance	3,246,588
2006 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible Ratio	2
Shares Approved for Issuance	2,870,221
2002 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible Ratio	1
Shares Approved for Issuance	2,111,567
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible Ratio	1