Fair Value (Details 3) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair value by pricing source
Available-for-sale securities	$ 599,941	$ 589,770
Fair value measurements on a recurring basis
Fair value by pricing source
Available-for-sale securities	599,941	589,770
Total	604,467	597,353
Fair value measurements on a recurring basis | Fixed maturities
Fair value by pricing source
Available-for-sale securities	587,209	564,540
Fair value measurements on a recurring basis | Fixed maturities | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	578,516
Fair value measurements on a recurring basis | Fixed maturities | Priced via market comparables/broker quotes
Fair value by pricing source
Available-for-sale securities	8,693
Fair value measurements on a recurring basis | Nonredeemable preferred stock
Fair value by pricing source
Available-for-sale securities		12,541
Fair value measurements on a recurring basis | Common stock
Fair value by pricing source
Available-for-sale securities	12,732	12,689
Fair value measurements on a recurring basis | Common stock | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	12,732
Fair value measurements on a recurring basis | Real estate
Fair value by pricing source
Other investments	4,526	7,583
Fair value measurements on a recurring basis | Real estate | Priced via unobservable inputs
Fair value by pricing source
Other investments	4,526
Fair value measurements on a recurring basis | Level 1
Fair value by pricing source
Available-for-sale securities	12,732	14,757
Total	12,732	14,757
Fair value measurements on a recurring basis | Level 1 | Fixed maturities
Fair value by pricing source
Available-for-sale securities	0	0
Fair value measurements on a recurring basis | Level 1 | Fixed maturities | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	0
Fair value measurements on a recurring basis | Level 1 | Fixed maturities | Priced via market comparables/broker quotes
Fair value by pricing source
Available-for-sale securities	0
Fair value measurements on a recurring basis | Level 1 | Nonredeemable preferred stock
Fair value by pricing source
Available-for-sale securities		2,068
Fair value measurements on a recurring basis | Level 1 | Common stock
Fair value by pricing source
Available-for-sale securities	12,732	12,689
Fair value measurements on a recurring basis | Level 1 | Common stock | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	12,732
Fair value measurements on a recurring basis | Level 2
Fair value by pricing source
Available-for-sale securities	578,563	575,013
Total	578,563	575,013
Fair value measurements on a recurring basis | Level 2 | Fixed maturities
Fair value by pricing source
Available-for-sale securities	578,563	564,540
Fair value measurements on a recurring basis | Level 2 | Fixed maturities | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	578,516
Fair value measurements on a recurring basis | Level 2 | Fixed maturities | Priced via market comparables/broker quotes
Fair value by pricing source
Available-for-sale securities	47
Fair value measurements on a recurring basis | Level 2 | Nonredeemable preferred stock
Fair value by pricing source
Available-for-sale securities		10,473
Fair value measurements on a recurring basis | Level 2 | Common stock
Fair value by pricing source
Available-for-sale securities	0	0
Fair value measurements on a recurring basis | Level 2 | Common stock | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	0
Fair value measurements on a recurring basis | Level 3
Fair value by pricing source
Available-for-sale securities	8,646	0
Total	8,646	0
Fair value measurements on a recurring basis | Level 3 | Priced via market comparables/broker quotes
Fair value by pricing source
Available-for-sale securities	8,600
Fair value measurements on a recurring basis | Level 3 | Fixed maturities
Fair value by pricing source
Available-for-sale securities	8,646	0
Fair value measurements on a recurring basis | Level 3 | Fixed maturities | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	0
Fair value measurements on a recurring basis | Level 3 | Fixed maturities | Priced via market comparables/broker quotes
Fair value by pricing source
Available-for-sale securities	8,646
Fair value measurements on a recurring basis | Level 3 | Nonredeemable preferred stock
Fair value by pricing source
Available-for-sale securities		0
Fair value measurements on a recurring basis | Level 3 | Common stock
Fair value by pricing source
Available-for-sale securities	0	$ 0
Fair value measurements on a recurring basis | Level 3 | Common stock | Priced via pricing services
Fair value by pricing source
Available-for-sale securities	0
Fair value measurements on a nonrecurring basis
Fair value by pricing source
Total	$ 0