Common Stock Shares Outstanding (Tables)

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Summary Of Common Stock Shares Issued And Outstanding Table [Text Block]

In thousands	Shares
Balance, December 31, 2011	26,756
Sales to employees under ESPP	18
Stock-based compensation	47
Sales to shareholders under DRPP	96
Balance, December 31, 2012	26,917
Sales to employees under ESPP	16
Stock-based compensation	42
Sales to shareholders under DRPP	100
Balance, December 31, 2013	27,075
Sales to employees under ESPP	24
Stock-based compensation	83
Sales to shareholders under DRPP	102
Balance, December 31, 2014	27,284