Fair Value Measurements, Unobservable Input Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
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	$ 2,231	$ 2,811	$ 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	0	0
Purchases	0	0	30	30
Sales	(237)	(241)	(459)	(590)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance at end of period	1,994	2,570	1,994	2,570
Amount of total losses included in earnings attributable to the change in unrealized losses on assets still held	0	0	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 attributable to the change in unrealized losses on assets still held		0		0
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	321	321	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	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance at end of period	321	321	321	321
Amount of total losses included in earnings attributable to the change in unrealized losses on assets still held	0	0	0	0
Total Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	2,552	3,132	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	0	0
Purchases	0	0	30	30
Sales	(237)	(241)	(459)	(17,479)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance at end of period	2,315	2,891	2,315	2,891
Amount of total losses included in earnings attributable to the change in unrealized losses on assets still held	0	0	0	0
Real Estate Acquired [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	10,804	8,741	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	(2,062)	(1,378)	(4,378)	(3,680)
Purchases	14,107	10,857	33,484	28,401
Sales	(6,284)	(5,844)	(25,821)	(15,808)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance at end of period	16,565	12,376	16,565	12,376
Amount of total losses included in earnings attributable to the change in unrealized losses on assets still held	$ 0	$ 0	$ 0	$ 0