Convertible Preferred Stock Convertible Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2012

Features of Convertible Preferred Stock [Abstract]

Schedule of Preferred Stock

The number of shares outstanding, conversion rates and corresponding conversion prices and conversion shares for our Series B Preferred Stock are listed below.

	December 31,
	2012		2011		2010
Shares outstanding (actual number)	221,474		221,474		221,474
Conversion rate per share	76.2197		74.4500		73.1904
Conversion price	$	13.12	$	13.43	$	13.66
Conversion shares	16.9		16.5		16.2