Mezzanine Equity (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Fair value discount rate	12.28%
Terminal growth rate	2.00%
Mandatorily redeemable convertible preferred shares redemption value	$ 125,000
Jefferies [Member]
Mandatorily redeemable convertible preferred shares redemption value	$ 125,000
Dividend rate on preferred stock	3.25%
Mandatorily redeemable preferred shares callable price per share	$ 1,000
Mandatory redeemable preferred stock, effective conversion price per share	$ 30.03
Mandatory redeemable preferred stock, number of shares in conversion	4,162,200