Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and Cash Equivalents, Fair Value Disclosure	$ 37,499	$ 30,423
Available-for-sale Securities, Fair Value Disclosure	91,077	192,234
Investments, Fair Value Disclosure	128,576	222,657
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Fair Value, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	552	551
Investments, Fair Value Disclosure	552	551
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Fair Value, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	27,710	29,920
Liabilities, Fair Value Disclosure	27,710	29,920
Fair Value, Total
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and Cash Equivalents, Fair Value Disclosure	37,499	30,423
Available-for-sale Securities, Fair Value Disclosure	91,629	192,785
Investments, Fair Value Disclosure	129,128	223,208
Other Liabilities, Fair Value Disclosure	27,710	29,920
Liabilities, Fair Value Disclosure	$ 27,710	$ 29,920