Fair Value Measurements, Unobservable Input Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as impairment losses, net	$ 0	$ 0
Obligations of U.S. States and Political Subdivisions [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	2,423	3,130
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as realized investment gains (losses), net		0
Included in earnings and reported as losses incurred, net	0	0
Purchases	30	30
Sales	(75)	(203)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at end of period	2,378	2,957
Amount of total losses included in earnings for the period attributable to the change in unrealized losses on assets still held at period end	0	0
Corporate Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	0	17,114
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as realized investment gains (losses), net		(225)
Included in earnings and reported as losses incurred, net	0	0
Purchases	0	0
Sales	0	(16,889)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at end of period	0	0
Amount of total losses included in earnings for the period attributable to the change in unrealized losses on assets still held at period end	0	0
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	321	321
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as realized investment gains (losses), net		0
Included in earnings and reported as losses incurred, net	0	0
Purchases	0	0
Sales	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at end of period	321	321
Amount of total losses included in earnings for the period attributable to the change in unrealized losses on assets still held at period end	0	0
Total Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	2,744	20,565
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as realized investment gains (losses), net		(225)
Included in earnings and reported as losses incurred, net	0	0
Purchases	30	30
Sales	(75)	(17,092)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at end of period	2,699	3,278
Amount of total losses included in earnings for the period attributable to the change in unrealized losses on assets still held at period end	0	0
Real Estate Acquired [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	13,280	3,463
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as realized investment gains (losses), net		0
Included in earnings and reported as losses incurred, net	(1,160)	(1,302)
Purchases	8,010	8,014
Sales	8,993	(2,651)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at end of period	11,137	7,524
Amount of total losses included in earnings for the period attributable to the change in unrealized losses on assets still held at period end	$ 0	$ 0