Investments (Held-to-Maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,137	$ 1,502
Gross Unrecognized Gains	62	107
Gross Unrecognized Losses	0	0
Fair Value	1,199	1,609
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	870	1,194
Gross Unrecognized Gains	53	91
Gross Unrecognized Losses	0	0
Fair Value	923	1,285
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	145	145
Gross Unrecognized Gains	1	2
Gross Unrecognized Losses	0	0
Fair Value	146	147
US Treasury Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	122	163
Gross Unrecognized Gains	8	14
Gross Unrecognized Losses	0	0
Fair Value	$ 130	$ 177