Goodwill and Other Intangibles (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Increase (decrease) in goodwill	$ 159,000	$ (2,185,000)
Goodwill impairment	0	0
Indefinite-lived intangible assets, other than goodwill	0	0
Amortization expense of amortizable intangible assets	3,900,000	4,000,000	4,700,000
Favorable leases [Member]
Weighted-average remaining useful life of favorable leases, in years	9 years 4 months 8 days
Unfavorable leases [Member]
Weighted-average remaining useful life of unfavorable leases, in years	4 years 6 months 11 days
Amortization benefit of unfavorable operating leases	$ 3,700,000	$ 4,500,000	$ 5,700,000