Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Jun. 30, 2013	Dec. 31, 2012
Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	$ 5,020,000	$ 18,000
Total Assets	5,020,000	18,000
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	0	0
Total Liabilities	0	0
Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	8,595,000	339,000
Total Assets	8,595,000	339,000
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	(2,404,000)	(3,146,000)
Total Liabilities	(2,404,000)	(3,146,000)
Difference between fair value and carrying value, debt	3,100,000
Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	0	0
Total Assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	0	0
Total Liabilities	0	0
Total [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	13,615,000	357,000
Total Assets	13,615,000	357,000
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	(2,404,000)	(3,146,000)
Total Liabilities	(2,404,000)	(3,146,000)
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Liabilities, Fair Value Disclosure [Abstract]
Carrying value, debt	$ 388,800,000