Investments (Held-to-Maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,502	$ 3,303
Gross Unrecognized Gains	107	194
Gross Unrecognized Losses	0	0
Fair Value	1,609	3,497
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,194	2,026
Gross Unrecognized Gains	91	125
Gross Unrecognized Losses	0	0
Fair Value	1,285	2,151
Private Label Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		55
Gross Unrecognized Gains		1
Gross Unrecognized Losses		0
Fair Value		56
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	145	996
Gross Unrecognized Gains	2	50
Gross Unrecognized Losses	0	0
Fair Value	147	1,046
US Treasury Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	163	226
Gross Unrecognized Gains	14	18
Gross Unrecognized Losses	0	0
Fair Value	$ 177	$ 244