Treasury Stock Treasury Stock Interim Disclosure (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Equity, Class of Stock [Line Items]
Treasury Stock, Value	$ 64,732		$ 48,084
Shares purchased for minimum tax withholding, cost	5,350	2,808
Treasury Stock, Shares	19,961,735		15,873,549
Treasury Stock
Equity, Class of Stock [Line Items]
Treasury Stock, Average Price Per Share	$ 3.24		$ 3.03
Shares Paid for Tax Withholding for Share Based Compensation	1,302,340
Shares purchased for minimum tax withholding, cost	5,350
Shares Paid for Tax Withholding for Share Based Compensation, Average Cost Per Share	$ 4.11
Treasury Stock, Shares, Acquired, Cost Method, Excluding Adjustments Related to Tax Withholding for Share-based Compensation	2,785,846
Purchase of treasury stock, cost	$ 11,298
Treasury Stock Acquired, Average Cost Per Share	$ 4.06