Debt (tables)

3 Months Ended

Mar. 31, 2013

Long-term Debt, Current and Noncurrent [Abstract]

Fair Value Of Long Term Debt Table [Text Block]

	March 31,				December 31,
In thousands	2013		2012		2012
Carrying amount	$	691,700	$	641,700	$	691,700
Estimated fair value	825,038		742,852		834,664