Cash Dividends (Tables)

3 Months Ended

Mar. 31, 2014

Stockholders' Equity Note [Abstract]

Schedule of Conversion Rates for Convertible Notes

Convertible Notes	Conversion Rate per $1,000 Principal Amount	Approximate Conversion Price Per Common Share		Effective Date
Series 2012 Notes	185.777	$	5.38	March 3, 2014
May 2015 Notes	162.7280	$	6.15	March 3, 2014