Debt Scheduled Principal Maturities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
September 30, 2013	$ 10,420
September 30, 2014	9,484
September 30, 2015	12,296
September 30, 2016	138,527
September 30, 2017	0
Thereafter	649,491
Total payments	820,218
Less: Amount representing estimated executory costs	(1,071)
Less: Amounts representing interest	(171)
Total debt	818,976	252,705
Senior Notes [Member]
Debt Instrument [Line Items]
September 30, 2013	0
September 30, 2014	0
September 30, 2015	0
September 30, 2016	0
September 30, 2017	0
Thereafter	649,491
Total payments	649,491
Less: Amount representing estimated executory costs	0
Less: Amounts representing interest	0
Total debt	649,491
Capital Lease [Member]
Debt Instrument [Line Items]
September 30, 2013	1,024
September 30, 2014	1,024
September 30, 2015	1,024
September 30, 2016	854
September 30, 2017	0
Thereafter	0
Total payments	3,926
Less: Amount representing estimated executory costs	(1,071)
Less: Amounts representing interest	(171)
Total debt	2,684	3,172
Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
September 30, 2013	9,375
September 30, 2014	8,437
September 30, 2015	11,250
September 30, 2016	137,663
September 30, 2017	0
Thereafter	0
Total payments	166,725
Less: Amount representing estimated executory costs	0
Less: Amounts representing interest	0
Total debt	166,725
Other Notes Payable [Member]
Debt Instrument [Line Items]
September 30, 2013	21
September 30, 2014	23
September 30, 2015	22
September 30, 2016	10
September 30, 2017	0
Thereafter	0
Total payments	76
Less: Amount representing estimated executory costs	0
Less: Amounts representing interest	0
Total debt	$ 76	$ 89