Schedule - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract]
Deferred tax asset valuation allowance-Balance Begining of Period	$ 60,041	$ 54,788	$ 50,312
Deferred tax asset valuation allowance-Additional Charged to Cost and Expense	5,231	5,253	4,476
Deferred tax asset valuation allowance-Balance at End of Period	$ 65,272	$ 60,041	$ 54,788