Investments Investments, Other Investments (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Schedule of Cost-method Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 450,074	$ 375,090
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	6,577	8,230
Fair Value of Limited Partnership Interest	4,910
DCR Mortgage Fund VI, L.P. [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	627
Available-for-sale Securities, Amortized Cost Basis	660
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	208
Fair Value of Limited Partnership Interest	868
RCH Mortgage Fund VI, L.P. [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	1,000
Available-for-sale Securities, Amortized Cost Basis	965
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	22
Fair Value of Limited Partnership Interest	987
Kayne Senior Credit Fund II, L.P. [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	1,005
Available-for-sale Securities, Amortized Cost Basis	1,005
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0
Fair Value of Limited Partnership Interest	1,005
DCR Mortgage Fund VII, L.P. [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	2,000
Available-for-sale Securities, Amortized Cost Basis	2,000
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0
Fair Value of Limited Partnership Interest	2,000
Blackstone Alternative Solutions Trust 2015 [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	50
Available-for-sale Securities, Amortized Cost Basis	50
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0
Fair Value of Limited Partnership Interest	50
Limited Partner [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	4,682
Available-for-sale Securities, Amortized Cost Basis	4,680
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	230
Fair Value of Limited Partnership Interest	4,910
Certificates of Deposit [Member]
Schedule of Cost-method Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	300
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0
Payments to Acquire Restricted Certificates of Deposit	300
Certificates of Deposit, at Carrying Value	300
Other Long-term Investments [Member]
Schedule of Cost-method Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	4,980	2,749
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	230	261
Cost Method Investments	4,982
Other Long-term Investments	5,210	$ 3,010
Fair Value, Inputs, Level 3 [Member] \| Limited Partner [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	1,627
Available-for-sale Securities, Amortized Cost Basis	1,625
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	230
Fair Value of Limited Partnership Interest	1,855
Level 2 [Member] \| Limited Partner [Member]
Schedule of Cost-method Investments [Line Items]
Payments to Acquire Limited Partnership Interests	3,055
Available-for-sale Securities, Amortized Cost Basis	3,055
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0
Fair Value of Limited Partnership Interest	$ 3,055

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- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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-Name Accounting Standards Codification
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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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Other long-term investments not otherwise specified in the taxonomy, not including investments in marketable securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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