Document and Entity Information [Abstract] Document Type Entity Registrant Name Entity Central Index Key Amendment Flag Represents information pertaining to B. Nicole Sherman. B Nicole Sherman [Member] B. Nicole Sherman (PEO #1) Represents information pertaining to Daniel D. Cox. Daniel D Cox [Member] Daniel D. Cox (PEO #2) Represents information pertaining to Kevin J. Lycklama. Kevin J Lycklama [Member] Kevin J. Lycklama (PEO #3)