Fair Value Disclosures (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers between Level 1 and Level 2 financial assets	$ 0	$ 0
Impairment charges	1,010,000	5,019,000	$ 3,323,000
Remaining goodwill	0	0	$ 0
Priced externally | Level 3 | Market Approach Valuation Technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	304,000	63,614,000
Priced internally | Level 3 | Market Approach Valuation Technique
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 65,600,000	$ 47,923,000