Long-Term Debt (9.25% Senior Notes - Narrative) (Details) (9.25% Senior Notes due 2020 [Member], USD $)	1 Months Ended	12 Months Ended
	Jul. 31, 2012	Dec. 31, 2012	Jul. 30, 2012
9.25% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt, issuance date		Jul. 30, 2012
Long-term debt, principal amount			$ 300,000,000
Long-term debt, stated interest rate			9.25%
Long-term debt, par percentage of proceeds			98.62%
Proceeds from issuance of long-term debt	291,200,000
Proceeds from the issuance of long-term debt, net of offering costs	290,200,000
Long-term debt, offering costs	$ 1,000,000
Redeemable percentage of aggregate principal amount of debt with proceeds from public or private offering prior to August 15, 2015		35.00%
Possible repurchase percentage of principal amount of long-term debt		101.00%