Fair Value Measurements, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Total realized/unrealized gains (losses) [Abstract]
State premium tax credit investments, average maturity			4 years
Annual average discount rate (in hundredths)					7.20%
Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	$ 1,791	$ 2,378	$ 1,846	$ 2,423
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as losses incurred, net	0	0	0	0
Purchases	0	0	7	30
Sales	(157)	(147)	(219)	(222)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance at end of period	1,791	2,378	1,846	2,423	$ 1,634	$ 2,231
Amount of total losses included in earnings attributable to the change in unrealized losses on assets still held	0	0	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 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	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	2,112	2,699	2,167	2,744
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as losses incurred, net	0	0	0	0
Purchases	0	0	7	30
Sales	(157)	(147)	(219)	(222)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance at end of period	2,112	2,699	2,167	2,744	1,955	2,552
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	10,897	11,137	12,658	13,280
Total realized/unrealized gains (losses) [Abstract]
Included in earnings and reported as losses incurred, net	31	(1,157)	(472)	(2,316)
Purchases	5,917	11,367	16,714	19,377
Sales	(8,850)	(10,543)	(20,905)	(19,537)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance at end of period	10,897	11,137	12,658	13,280	$ 7,995	$ 10,804
Amount of total losses included in earnings attributable to the change in unrealized losses on assets still held	$ 0	$ 0	$ 0	$ 0