Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets:
Policy loans	$ 13,124	$ 13,355
Other long-term investments	148,542	162,783
Accrued investment income	23,079	25,008
Receivables from parent and affiliates	61,108	60,490
Liabilities:
Cash collateral for loaned securities	4,724	5,285
Short-term debt	0	54,354
Payables to parent and affiliates	56,135	71,675
Level 3
Assets:
Receivables from parent and affiliates	4,777	22,320
Fair Value
Assets:
Commercial mortgage and other loans	429,599	449,936
Policy loans	13,124	13,355
Other long-term investments	2,718	2,639
Cash and cash equivalents	3,448	369
Accrued investment income	23,079	25,008
Receivables from parent and affiliates	20,518	10,367
Other assets	1,180	1,009
Total assets	493,666	502,683
Liabilities:
Policyholders’ account balances - investment contracts	102,624	91,217
Cash collateral for loaned securities	4,724	5,285
Short-term debt		54,354
Payables to parent and affiliates	31,293	37,415
Other liabilities	92,738	89,956
Separate account liabilities - investment contracts	387	487
Total liabilities	231,766	278,714
Fair Value | Level 1
Assets:
Commercial mortgage and other loans	0	0
Policy loans	0	0
Other long-term investments	0	0
Cash and cash equivalents	3,448	369
Accrued investment income	0	0
Receivables from parent and affiliates	0	0
Other assets	0	0
Total assets	3,448	369
Liabilities:
Policyholders’ account balances - investment contracts	0	0
Cash collateral for loaned securities	0	0
Short-term debt		0
Payables to parent and affiliates	0	0
Other liabilities	0	0
Separate account liabilities - investment contracts	0	0
Total liabilities	0	0
Fair Value | Level 2
Assets:
Commercial mortgage and other loans	2,766	2,779
Policy loans	0	0
Other long-term investments	0	0
Cash and cash equivalents	0	0
Accrued investment income	23,079	25,008
Receivables from parent and affiliates	20,518	10,367
Other assets	1,180	1,009
Total assets	47,543	39,163
Liabilities:
Policyholders’ account balances - investment contracts	0	0
Cash collateral for loaned securities	4,724	5,285
Short-term debt		54,354
Payables to parent and affiliates	31,293	37,415
Other liabilities	92,738	89,956
Separate account liabilities - investment contracts	387	487
Total liabilities	129,142	187,497
Fair Value | Level 3
Assets:
Commercial mortgage and other loans	426,833	447,157
Policy loans	13,124	13,355
Other long-term investments	2,718	2,639
Cash and cash equivalents	0	0
Accrued investment income	0	0
Receivables from parent and affiliates	0	0
Other assets	0	0
Total assets	442,675	463,151
Liabilities:
Policyholders’ account balances - investment contracts	102,624	91,217
Cash collateral for loaned securities	0	0
Short-term debt		0
Payables to parent and affiliates	0	0
Other liabilities	0	0
Separate account liabilities - investment contracts	0	0
Total liabilities	102,624	91,217
Carrying Amount
Assets:
Commercial mortgage and other loans	406,918	422,563
Policy loans	13,124	13,355
Other long-term investments	2,376	2,238
Cash and cash equivalents	3,448	369
Accrued investment income	23,079	25,008
Receivables from parent and affiliates	20,518	10,367
Other assets	1,180	1,009
Total assets	470,643	474,909
Liabilities:
Policyholders’ account balances - investment contracts	102,793	92,663
Cash collateral for loaned securities	4,724	5,285
Short-term debt		54,354
Payables to parent and affiliates	31,293	37,415
Other liabilities	92,738	89,956
Separate account liabilities - investment contracts	387	487
Total liabilities	$ 231,935	$ 280,160