Securities (Narrative) (Details)	9 Months Ended
	Sep. 30, 2013
Current [Member]
Schedule of Held-to-maturity Securities [Line Items]
Assets maturity range	1 year
Maximum [Member] | Noncurrent [Member]
Schedule of Held-to-maturity Securities [Line Items]
Assets maturity range	3 years
Minimum [Member] | Noncurrent [Member]
Schedule of Held-to-maturity Securities [Line Items]
Assets maturity range	1 year