Cash and Cash Equivalents (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Restricted Cash and Cash Equivalents Items [Line Items]
Cash	$ 27,476,000	$ 34,099,000
Cash equivalents	4,819,000	3,484,000
Restricted cash	4,600,000	5,100,000
Total cash and cash equivalents	36,870,000	42,679,000	30,344,000	50,324,000
Distribution period	7 years
Deferred compensation liability	500,000	900,000
Deferred compensation plan
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	496,000	867,000
Letter of Credit
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 4,079,000	$ 4,229,000