Subsequent Events (Details Textual) (USD $) In Thousands, unless otherwise specified	0 Months Ended	1 Months Ended	0 Months Ended
	Nov. 15, 2013 6.75% Notes [Member]	Mar. 20, 2013 6.75% Notes [Member]	Apr. 02, 2014 Subsequent Event [Member]	Apr. 02, 2014 Subsequent Event [Member] 6.75% Notes [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount	$ 110,000			$ 75,000
Proceeds from Issuance of Debt	111,925	537,600	77,452
Debt Instrument, Unamortized Premium	4,125		3,938
Expense Related to Distribution or Servicing and Underwriting Fees	2,200		1,500
Debt Instrument, Prepayment of Interest			$ 14