Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 08, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedge Loss at Settlement Date					$ 3,257
Cash Flow Loss Reclassified to Interest Expense at Settlement Date					1,990
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	0	223	0	612
Cash Flow Hedge Loss Reclassified to Interest Expense		$ 301		$ 884