Debt	12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]
Debt	NOTE 7. DEBT Credit Facilities On November 4, 2016, NUAL entered into a credit facility for 14.0 million Australian Dollars with Barclays Bank PLC. Interest is payable under this facility at a rate of 1.25% per annum. The facility may be cancelled by either party after providing written notice. This credit facility contains customary covenants for facilities of this type, including a restriction on future encumbrances that are outside the ordinary course of business, and a requirement to maintain at least £75.0 million of Funds at Lloyd’s. As of December 31, 2016, letters of credit with an aggregate face amount of 14.0 million Australian Dollars were outstanding under the credit facility, and our Company was in compliance with all covenants. On November 7, 2016, we entered into a credit facility agreement with ING Bank N.V., London Branch, individually and as Administrative Agent and a syndicate of lenders (the “Club Facility”), which is secured by all the common stock of NIC and requires us to maintain at least forty percent of the outstanding amounts under such facility as Funds at Lloyd’s. The Club Facility has two tranches with one tranche extending a $140.0 million commitment and the other tranche extending a £60.0 million commitment. In addition, in order to support the increased underwriting capacity of the Syndicate for the 2017 UWY, we amended that certain $25.0 million credit facility with ING Bank N.V., London Branch, dated November 20, 2015, on November 7, 2016, to extend the term for an additional two years (the “Bilateral Facility”). Both of these facilities, as well as the November 4, 2016 facility, are used to fund underwriting obligations at Lloyd’s for the 2017 UWY, as well as open prior UWYs. The Bilateral Facility is a non-committed facility which has an applicable fee rate ranging from 0.85% to 1.20% per annum based upon the Company’s S&P rating. For the Club Facility the applicable fee rate payable ranges from 0.95% to 1.60% per annum based on a tiered schedule that is based on our then-current financial strength ratings issued by S&P and A.M. Best and the amount of our own collateral utilized to fund our participation in the Syndicate. If any letters of credit remain outstanding under these facilities after December 31, 2018, we would be required to post additional collateral to secure the remaining letters of credit. As of December 31, 2016, letters of credit with an aggregate face amount of $125.0 million and £60.0 million were outstanding under the Club Facility and we had an aggregate of $1.1 million of cash collateral posted. As of December 31, 2016 there were no letters of credit outstanding under the Bilateral Facility. The Bilateral and Club Facilities contain customary covenants for facilities of this type, including restrictions on indebtedness and liens, limitations on mergers, dividends and the sale of assets, and requirements as to maintaining certain consolidated tangible net worth, statutory surplus and other financial ratios. These credit facilities also provide for customary events of default, including failure to pay principal, interest or fees when due, failure to comply with covenants, any representation or warranty made by our Company being false in any material respect, default under certain other indebtedness, certain insolvency or receivership events affecting our Company and our subsidiaries, the occurrence of certain material judgments, or a change in control of our Company. As of December 31, 2016, our Company was in compliance with all covenants. Senior notes On October 4, 2013, our Company completed a public debt offering of $265.0 million principal amount of the 5.75% Senior notes and received net proceeds of $263.3 million. Our Company used a portion of the proceeds for the redemption of the 7.0% Senior notes due May 1, 2016 (“7.0% Senior notes”), as well as a $17.9 million call premium in connection with the redemption of the 7.0% Senior notes. The unamortized discount as of December 31, 2016 and 2015 was $1.3 million and $1.4 million, respectively. The interest rate payable on the 5.75% Senior notes is subject to a tiered adjustment based on defined changes in our Company’s debt ratings. Our Company may redeem the 5.75% Senior notes in whole at any time or in part from time to time at a make-whole redemption price. The 5.75% Senior notes are our Company’s only senior unsecured obligation and will rank equally with future senior unsecured indebtedness. The terms of the 5.75% Senior notes contain various restrictive business and financial covenants, including a restriction on indebtedness, and other restrictions typical for debt obligations of this type, including limitations on mergers, liens and dispositions of the Common stock of certain subsidiaries. As of December 31, 2016, our Company was in compliance with all such covenants.

NOTE 7. DEBT

Credit Facilities

On November 4, 2016, NUAL entered into a credit facility for 14.0 million Australian Dollars with Barclays Bank PLC. Interest is payable under this facility at a rate of 1.25% per annum. The facility may be cancelled by either party after providing written notice. This credit facility contains customary covenants for facilities of this type, including a restriction on future encumbrances that are outside the ordinary course of business, and a requirement to maintain at least £75.0 million of Funds at Lloyd’s. As of December 31, 2016, letters of credit with an aggregate face amount of 14.0 million Australian Dollars were outstanding under the credit facility, and our Company was in compliance with all covenants.

On November 7, 2016, we entered into a credit facility agreement with ING Bank N.V., London Branch, individually and as Administrative Agent and a syndicate of lenders (the “Club Facility”), which is secured by all the common stock of NIC and requires us to maintain at least forty percent of the outstanding amounts under such facility as Funds at Lloyd’s. The Club Facility has two tranches with one tranche extending a $140.0 million commitment and the other tranche extending a £60.0 million commitment. In addition, in order to support the increased underwriting capacity of the Syndicate for the 2017 UWY, we amended that certain $25.0 million credit facility with ING Bank N.V., London Branch, dated November 20, 2015, on November 7, 2016, to extend the term for an additional two years (the “Bilateral Facility”). Both of these facilities, as well as the November 4, 2016 facility, are used to fund underwriting obligations at Lloyd’s for the 2017 UWY, as well as open prior UWYs.

The Bilateral Facility is a non-committed facility which has an applicable fee rate ranging from 0.85% to 1.20% per annum based upon the Company’s S&P rating. For the Club Facility the applicable fee rate payable ranges from 0.95% to 1.60% per annum based on a tiered schedule that is based on our then-current financial strength ratings issued by S&P and A.M. Best and the amount of our own collateral utilized to fund our participation in the Syndicate. If any letters of credit remain outstanding under these facilities after December 31, 2018, we would be required to post additional collateral to secure the remaining letters of credit. As of December 31, 2016, letters of credit with an aggregate face amount of $125.0 million and £60.0 million were outstanding under the Club Facility and we had an aggregate of $1.1 million of cash collateral posted. As of December 31, 2016 there were no letters of credit outstanding under the Bilateral Facility.

The Bilateral and Club Facilities contain customary covenants for facilities of this type, including restrictions on indebtedness and liens, limitations on mergers, dividends and the sale of assets, and requirements as to maintaining certain consolidated tangible net worth, statutory surplus and other financial ratios. These credit facilities also provide for customary events of default, including failure to pay principal, interest or fees when due, failure to comply with covenants, any representation or warranty made by our Company being false in any material respect, default under certain other indebtedness, certain insolvency or receivership events affecting our Company and our subsidiaries, the occurrence of certain material judgments, or a change in control of our Company. As of December 31, 2016, our Company was in compliance with all covenants.

Senior notes

On October 4, 2013, our Company completed a public debt offering of $265.0 million principal amount of the 5.75% Senior notes and received net proceeds of $263.3 million. Our Company used a portion of the proceeds for the redemption of the 7.0% Senior notes due May 1, 2016 (“7.0% Senior notes”), as well as a $17.9 million call premium in connection with the redemption of the 7.0% Senior notes. The unamortized discount as of December 31, 2016 and 2015 was $1.3 million and $1.4 million, respectively.

The interest rate payable on the 5.75% Senior notes is subject to a tiered adjustment based on defined changes in our Company’s debt ratings. Our Company may redeem the 5.75% Senior notes in whole at any time or in part from time to time at a make-whole redemption price. The 5.75% Senior notes are our Company’s only senior unsecured obligation and will rank equally with future senior unsecured indebtedness.

The terms of the 5.75% Senior notes contain various restrictive business and financial covenants, including a restriction on indebtedness, and other restrictions typical for debt obligations of this type, including limitations on mergers, liens and dispositions of the Common stock of certain subsidiaries. As of December 31, 2016, our Company was in compliance with all such covenants.