Stock Repurchase Program (Details Textual) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 31, 2002 Program2002 [Member]	Dec. 31, 2013 Common Stock [Member] Program2002 [Member]	Dec. 31, 2013 Common Stock [Member] Program2007 [Member]	Feb. 13, 2007 Common Stock [Member] Program2007 [Member]
Option Indexed to Issuers Equity [Line Items]
Stock Repurchase Program, Authorized Amount	$ 300
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			100	100
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 72