Derivatives and Hedging Activity (Tables)

12 Months Ended

Dec. 31, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments [Table Text Block]

Month executed	Number of Contracts	Beginning Date	Maturity Date	Rate	Total Notional Amount (millions)
December 2009	4	June 30, 2010	May 31, 2012	1.83%	$60.0
March 2010	2	June 30, 2010	May 31, 2012	1.45%	$30.0
November 2011	1	May 31, 2012	May 31, 2015	0.98%	$10.0
December 2011	2	December 31, 2012	December 31, 2015	1.17%	$10.0
March 2012	1	June 29, 2012	June 30, 2015	1.01%	$5.0
May 2012	1	June 28, 2013	May 27, 2016	1.15%	$5.0