NMI (NMIH) 10-Q 3 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	NMI HOLDINGS, INC.
Entity Central Index Key	1,547,903
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Amendment Flag	false
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		59,138,663

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Fixed maturities, available-for-sale, at fair value (amortized cost of $628,209 and $564,319 as of September 30, 2016 and December 31, 2015, respectively)	$ 641,572	$ 559,235
Cash and cash equivalents	44,522	57,317
Premiums receivable	11,378	5,143
Accrued investment income	3,615	2,873
Prepaid expenses	2,313	1,428
Deferred policy acquisition costs, net	28,911	17,530
Software and equipment, net	19,924	15,201
Intangible assets and goodwill	3,634	3,634
Prepaid reinsurance premiums	36,091	0
Other assets	206	90
Total assets	792,166	662,451
Liabilities
Term loan	144,230	143,939
Unearned premiums	145,401	90,773
Accounts payable and accrued expenses	32,568	22,725
Reserve for insurance claims and claim expenses	2,133	679
Reinsurance funds withheld	28,963	0
Deferred ceding commission	6,697	0
Warrant liability, at fair value	1,654	1,467
Current tax payable	114	0
Deferred tax	137	137
Total liabilities	361,897	259,720
Commitments and contingencies
Shareholders' Equity
Additional paid-in capital	575,148	570,340
Accumulated other comprehensive income (loss), net of tax	10,974	(7,474)
Accumulated deficit	(156,444)	(160,723)
Total shareholders' equity	430,269	402,731
Total liabilities and shareholders' equity	792,166	662,451
Common Stock - Class A
Shareholders' Equity
Common stock - class A shares, $0.01 par value; 59,138,663 and 58,807,825 shares issued and outstanding as of September 30, 2016 and December 31, 2015, respectively (250,000,000 shares authorized)	$ 591	$ 588

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fixed maturities, amortized cost	$ 628,209	$ 564,319
Common Stock - Class A
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	59,138,663	58,807,825
Common stock, shares outstanding (in shares)	59,138,663	58,807,825
Common stock, shares authorized (in shares)	250,000,000	250,000,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Net premiums earned	$ 31,808	$ 12,834	$ 77,656	$ 28,626
Net investment income	3,544	1,884	10,117	5,168
Net realized investment gains (losses)	66	(15)	(758)	952
Other revenues	102	0	172	0
Total revenues	35,520	14,703	87,187	34,746
Expenses
Insurance claims and claims expenses	664	181	1,592	279
Underwriting and operating expenses	24,037	19,653	69,943	58,912
Total expenses	24,701	19,834	71,535	59,191
Other (expense) income
(Loss) gain from change in fair value of warrant liability	(797)	332	(187)	1,473
Interest expense	(3,733)	0	(11,072)	0
Total other (expense) income	(4,530)	332	(11,259)	1,473
Income (loss) before income taxes	6,289	(4,799)	4,393	(22,972)
Income tax expense	114	0	114	0
Net income (loss)	$ 6,175	$ (4,799)	$ 4,279	$ (22,972)
Earnings (loss) per share
Basic earnings (loss) per share (in dollars per share)	$ 0.10	$ (0.08)	$ 0.07	$ (0.39)
Diluted earnings (loss) per share (in dollars per share)	$ 0.10	$ (0.08)	$ 0.07	$ (0.39)
Weighted average common shares outstanding
Basic weighted average shares outstanding (in shares)	59,130,401	58,741,328	59,047,758	58,650,043
Dilutive weighted average shares outstanding (in shares)	60,284,746	58,741,328	59,861,916	58,650,043
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) in accumulated other comprehensive gain (loss), net of tax (benefit) expense of $0 for all periods presented	$ (82)	$ (483)	$ 17,690	$ (15)
Reclassification adjustment for losses (gains) included in net loss, net of tax expense of $0 for all periods presented	(66)	15	758	(952)
Other comprehensive income (loss), net of tax	(148)	(468)	18,448	(967)
Comprehensive income (loss)	$ 6,027	$ (5,267)	$ 22,727	$ (23,939)

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net unrealized investment gains in AOCI, tax amount	$ 0	$ 0	$ 0	$ 0
Reclassification adjustment for losses (gains) included in net loss, tax amount	$ 0	$ 0	$ 0	$ 0

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Common StockClass A	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2014		58,429
Beginning balance at Dec. 31, 2014	$ 426,958	$ 584	$ 562,911	$ (3,607)	$ (132,930)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock: class A shares issued under stock plans, net of shares withheld for employee taxes (in shares)		379
Common stock: class A shares issued under stock plans, net of shares withheld for employee taxes	(690)	$ 4	(694)
Share-based compensation expense	8,123		8,123
Change in unrealized investment gains/losses, net of tax	(3,867)			(3,867)
Net income (loss)	(27,793)				(27,793)
Ending balance (in shares) at Dec. 31, 2015		58,808
Ending balance at Dec. 31, 2015	402,731	$ 588	570,340	(7,474)	(160,723)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock: class A shares issued under stock plans, net of shares withheld for employee taxes (in shares)		331
Common stock: class A shares issued under stock plans, net of shares withheld for employee taxes	(168)	$ 3	(171)
Share-based compensation expense	4,979		4,979
Change in unrealized investment gains/losses, net of tax	18,448			18,448
Net income (loss)	4,279				4,279
Ending balance (in shares) at Sep. 30, 2016		59,139
Ending balance at Sep. 30, 2016	$ 430,269	$ 591	$ 575,148	$ 10,974	$ (156,444)

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]
Change in unrealized investment gains/losses, tax	$ 0	$ 0	$ 0	$ 0	$ 0

CONDENSED CONSOLIDATED STATEME8

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net income (loss)	$ 4,279	$ (22,972)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Net realized investment losses (gains)	758	(952)
Loss (gain) from change in fair value of warrant liability	187	(1,473)
Depreciation and amortization	4,300	3,646
Net amortization of premium on investment securities	954	0
Amortization of debt discount and debt issuance costs	1,416	0
Share-based compensation expense	4,987	5,895
Changes in operating assets and liabilities:
Current tax payable	114	0
Accrued investment income	(742)	28
Premiums receivable	(6,235)	(2,938)
Prepaid expenses	(885)	271
Deferred policy acquisition costs, net	(11,381)	(9,196)
Other assets	(116)	453
Unearned premiums	54,628	40,003
Reserve for insurance claims and claims expenses	1,454	275
Reinsurance balances, net	(431)	0
Accounts payable and accrued expenses	(1,075)	3,131
Net cash provided by operating activities	52,212	16,171
Cash flows from investing activities
Purchase of fixed-maturity investments, available-for-sale	(251,056)	(111,215)
Proceeds from redemptions, maturities and sale of fixed-maturity investments, available-for-sale	195,791	129,666
Purchase of software and equipment	(8,449)	(4,173)
Net cash (used in) provided by investing activities	(63,714)	14,278
Cash flows from financing activities
Issuance of common stock	526	415
Taxes paid related to net share settlement of equity awards	(694)	(1,094)
Repayments of term loan	(1,125)	0
Net cash used in financing activities	(1,293)	(679)
Net (decrease) increase in cash and cash equivalents	(12,795)	29,770
Cash and cash equivalents, beginning of period	57,317	103,021
Cash and cash equivalents, end of period	44,522	132,791
Noncash financing activities
Interest paid	$ 9,669	$ 0

Organization and Basis of Prese

Organization and Basis of Presentation	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation NMI Holdings, Inc. (NMIH) is a Delaware corporation, incorporated in May 2011, to provide private mortgage guaranty insurance (which we refer to as mortgage insurance or MI) through its wholly owned insurance subsidiaries, National Mortgage Insurance Corporation (NMIC) and National Mortgage Reinsurance Inc One (Re One). In April 2012, we completed a private placement of our securities, through which we offered and sold an aggregate of 55,000,000 of our Class A common stock resulting in net proceeds of approximately $510 million (the Private Placement), and we completed the acquisition of our insurance subsidiaries for $8.5 million in cash, common stock and warrants, plus the assumption of $1.3 million in liabilities. In November 2013, we completed an initial public offering of 2.4 million shares of our common stock, and our common stock began trading on the NASDAQ exchange on November 8, 2013, under the symbol "NMIH." In April 2013, NMIC, our primary insurance subsidiary, issued its first mortgage insurance policy. NMIC is licensed to write mortgage insurance in all 50 states and D.C. In August 2015, NMIH capitalized a wholly owned subsidiary, NMI Services, Inc. (NMIS), through which we offer outsourced loan review services on a limited basis to mortgage loan originators. Basis of Presentation The accompanying unaudited condensed consolidated financial statements, which include the results of NMIH and its wholly owned subsidiaries, have been prepared in accordance with the instructions to Form 10-Q as prescribed by the SEC for interim reporting and include other information and disclosures required by accounting principles generally accepted in the U.S. (GAAP). Our accounts are maintained in U.S. dollars. These statements should be read in conjunction with our consolidated financial statements and notes thereto for the year ended December 31, 2015 , included in our 2015 10-K. All intercompany transactions have been eliminated. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, as well as disclosure of contingent assets and liabilities as of the balance sheet date. Estimates also affect the reported amounts of income and expenses for the reporting period. Actual results could differ from those estimates. The results of operations for the interim period may not be indicative of the results that may be expected for the full year ending December 31, 2016 . Deferred Policy Acquisition Costs Costs directly associated with the successful acquisition of mortgage insurance policies, consisting of certain selling expenses and other policy issuance and underwriting expenses, are initially deferred and reported as deferred policy acquisition costs (DAC). DAC is reviewed periodically to determine that it does not exceed recoverable amounts and is adjusted as appropriate for policy cancellations to be consistent with our revenue recognition policy. We estimate the rate of amortization to reflect actual experience and any changes to persistency or loss development. For each book year of business, these costs are amortized to expense in proportion to estimated gross profits over the estimated life of the policies. Total amortization of DAC for the nine months ended September 30, 2016 and 2015 , net of a portion of ceding commission related to the 2016 QSR Transaction (see Note 5), was $3.4 million and $1.8 million , respectively. Premium Deficiency Reserves We consider whether a premium deficiency exists at each fiscal quarter using best estimate assumptions as of the testing date. Per Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 944, a premium deficiency reserve shall be recognized if the sum of expected claim costs and claim adjustment expenses, expected dividends to policyholders, unamortized acquisition costs and maintenance costs exceeds related unearned premiums and anticipated investment income. We have determined that no premium deficiency reserves were necessary for the nine months ended September 30, 2016 or 2015 . Reinsurance We account for premiums, losses and loss expenses that are ceded to reinsurers on bases consistent with those we use to account for the original policies we issue and pursuant to the terms of our reinsurance contracts. We account for premiums ceded to reinsurers as reductions to premium revenue. We earn profit commissions, which represent a percentage of the profits recognized by the reinsurers that are returned to us, based on the level of losses ceded. We recognize any profit commissions we earn as increases in net premium revenue. We receive ceding commissions, calculated as a percentage of ceded written premiums, which are intended to cover our costs to acquire and service the direct policies. We earn the ceding commissions in a manner consistent with our recognition of earnings on the underlying insurance policies, over the terms of the policies reinsured. We account for ceding commissions as reductions to underwriting and operating expenses. We cede a portion of loss reserves, paid losses and loss expenses, which are accounted for as reductions to loss expense and as reinsurance recoverables. We remain directly liable for all loss payments in the event we are unable to collect from any reinsurer. Recent Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606). This update is intended to provide a consistent approach in recognizing revenue. In accordance with the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, the new standard requires that reporting companies disclose the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. In August 2015, ASU 2015-14 deferred the provisions of ASU 2014-09 to be effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the impact the adoption of this ASU will have, if any, on the consolidated financial statements. In August 2014, the FASB issued an update that requires an entity's management to evaluate whether there is substantial doubt about that entity's ability to continue as a going concern and, if so, disclose that fact. An entity's management will also be required to evaluate and disclose whether its plans alleviate that doubt. The guidance is effective for annual periods ending after December 15, 2016 and for interim and annual periods thereafter. We do not expect the adoption of this update to have a material effect on the presentation of our financial statements and notes therein. In May 2015, the FASB issued ASU 2015-09, Disclosures about Short-Duration Contracts (Topic 944), which requires insurance entities to disclose additional information related to the liability for unpaid claims and claims adjustment expenses. These disclosures include the nature, amount, timing and uncertainty of cash flows related to those liabilities and the effects of those cash flows on comprehensive income. This update is effective for annual periods beginning after December 15, 2015 and interim periods within annual periods beginning after December 15, 2016. We do not expect the adoption of this update to have a material effect on the presentation of our financial statements and notes therein. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This update requires that businesses recognize rights and obligations associated with certain leases as assets and liabilities on the balance sheet. The standard also requires additional disclosures regarding the amount, timing, and uncertainty of cash flows arising from leases. For public business entities, this update is effective for annual periods beginning after December 15, 2018, and interim periods therein. Early adoption is permitted in any period. The Company is currently evaluating the impact the adoption of this ASU will have on the consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Compensation-Stock Compensation (Topic 718). This update is intended to provide improvements to employee share-based payment accounting. The areas for simplification in the update involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. For public business entities, the amendments in this update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any period. The Company is currently evaluating the impact the adoption of this ASU will have on the consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326). This update requires companies to measure all expected credit losses for financial assets held at the reporting date. The accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration also is amended in the standard. The standard will take effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently evaluating the impact the adoption of this ASU will have on the presentation of the consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230). This update is intended to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The standard will take effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company is currently evaluating the impact the adoption of this ASU will have on the presentation of the consolidated financial statements.

Investments

Investments	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Investments	Investments We have designated our investment portfolio as available-for-sale and report it at fair value. The related unrealized gains and losses are, after considering the related tax expense or benefit, recognized as a component of accumulated other comprehensive income and loss in shareholders' equity. Net realized investment gains and losses are reported in income based upon specific identification of securities sold. Fair Values and Gross Unrealized Gains and Losses on Investments Amortized Gross Unrealized Fair Gains Losses As of September 30, 2016 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 57,338 $ 552 $ (13 ) $ 57,877 Municipal debt securities 40,057 919 (43 ) 40,933 Corporate debt securities 336,113 10,443 (227 ) 346,329 Asset-backed securities 120,429 1,706 (66 ) 122,069 Total bonds 553,937 13,620 (349 ) 567,208 Short-term investments 74,272 93 (1 ) 74,364 Total investments $ 628,209 $ 13,713 $ (350 ) $ 641,572 Amortized Gross Unrealized Fair Gains Losses As of December 31, 2015 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 84,968 $ 4 $ (490 ) $ 84,482 Municipal debt securities 20,209 44 (174 ) 20,079 Corporate debt securities 337,273 431 (4,377 ) 333,327 Asset-backed securities 101,320 76 (603 ) 100,793 Total bonds 543,770 555 (5,644 ) 538,681 Short-term investments 20,549 5 — 20,554 Total investments $ 564,319 $ 560 $ (5,644 ) $ 559,235 As of September 30, 2016 and December 31, 2015 , there were approximately $6.9 million and $7.0 million , respectively, of cash and investments in the form of U.S. Treasury securities on deposit with various state insurance departments to satisfy regulatory requirements. Scheduled Maturities The amortized cost and fair values of available for sale securities as of September 30, 2016 and December 31, 2015 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Because most asset-backed securities provide for periodic payments throughout their lives, they are listed below in separate categories. As of September 30, 2016 Amortized Fair (In Thousands) Due in one year or less $ 100,443 $ 100,556 Due after one through five years 158,761 161,063 Due after five through ten years 238,559 248,040 Due after ten years 10,017 9,844 Asset-backed securities 120,429 122,069 Total investments $ 628,209 $ 641,572 As of December 31, 2015 Amortized Fair (In Thousands) Due in one year or less $ 62,745 $ 62,743 Due after one through five years 187,633 186,629 Due after five through ten years 193,379 190,055 Due after ten years 19,242 19,015 Asset-backed securities 101,320 100,793 Total investments $ 564,319 $ 559,235 Aging of Unrealized Losses As of September 30, 2016 , the investment portfolio had gross unrealized losses of $0.3 million , $0.2 million of which has been in an unrealized loss position for a period of 12 months or greater. We did not consider these securities to be other-than-temporarily impaired as of September 30, 2016 . We based our conclusion that these investments were not other-than-temporarily impaired as of September 30, 2016 on the following facts: (i) the unrealized losses were primarily caused by interest rate movements since the purchase date; (ii) we do not intend to sell these investments; and (iii) we do not believe that it is more likely than not that we will be required to sell these investments before recovery of our amortized cost basis, which may not occur until maturity. For those securities in an unrealized loss position, the length of time the securities were in such a position is as follows: Less Than 12 Months 12 Months or Greater Total # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses As of September 30, 2016 (Dollars in Thousands) U.S. Treasury securities and obligations of U.S. government agencies 10 $ 6,915 $ (13 ) — $ — $ — 10 $ 6,915 $ (13 ) Municipal debt securities 4 3,582 (18 ) 1 1,725 (25 ) 5 5,307 (43 ) Corporate debt securities 5 11,183 (24 ) 8 14,085 (203 ) 13 25,268 (227 ) Asset-backed securities 10 14,481 (59 ) 4 2,192 (7 ) 14 16,673 (66 ) Total investments 29 $ 36,161 $ (114 ) 13 $ 18,002 $ (235 ) 42 $ 54,163 $ (349 ) Less Than 12 Months 12 Months or Greater Total # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses As of December 31, 2015 (Dollars in Thousands) U.S. Treasury securities and obligations of U.S. government agencies 14 $ 50,558 $ (397 ) 4 $ 10,194 $ (93 ) 18 $ 60,752 $ (490 ) Municipal debt securities 4 11,293 (165 ) 1 3,242 (9 ) 5 14,535 (174 ) Corporate debt securities 83 244,128 (4,124 ) 4 9,220 (253 ) 87 253,348 (4,377 ) Asset-backed securities 27 69,878 (498 ) 4 9,208 (105 ) 31 79,086 (603 ) Total investments 128 $ 375,857 $ (5,184 ) 13 $ 31,864 $ (460 ) 141 $ 407,721 $ (5,644 ) Net Investment Income For the three months ended September 30, For the nine months ended September 30, 2016 2015 2016 2015 (In Thousands) Investment income $ 3,727 $ 2,012 $ 10,672 $ 5,537 Investment expenses (183 ) (128 ) (555 ) (369 ) Net investment income $ 3,544 $ 1,884 $ 10,117 $ 5,168 Net Realized Investment Gains (Losses) For the three months ended September 30, For the nine months ended September 30, 2016 2015 2016 2015 (In Thousands) Gross realized investment gains $ 66 $ 266 $ 683 $ 1,526 Gross realized investment losses — (281 ) (1,441 ) (574 ) Net realized investment gains (losses) $ 66 $ (15 ) $ (758 ) $ 952

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The following is a list of those assets and liabilities that are measured at fair value by hierarchy level: Fair Value Measurements Using Quoted Prices in Significant Other Significant Fair Value As of September 30, 2016 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 45,398 $ 12,479 $ — $ 57,877 Municipal debt securities — 40,933 — 40,933 Corporate debt securities — 346,329 — 346,329 Asset-backed securities — 122,069 — 122,069 Cash, cash equivalents and short-term investments 118,886 — — 118,886 Total assets $ 164,284 $ 521,810 $ — $ 686,094 Warrant liability — — 1,654 1,654 Total liabilities $ — $ — $ 1,654 $ 1,654 Fair Value Measurements Using Quoted Prices in Significant Other Significant Fair Value As of December 31, 2015 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 65,185 $ 19,297 $ — $ 84,482 Municipal debt securities — 20,079 — 20,079 Corporate debt securities — 333,327 — 333,327 Asset-backed securities — 100,793 — 100,793 Cash, cash equivalents and short-term investments 77,872 — — 77,872 Total assets $ 143,057 $ 473,496 $ — $ 616,553 Warrant liability — — 1,467 1,467 Total liabilities $ — $ — $ 1,467 $ 1,467 The following is a roll-forward of Level 3 liabilities measured at fair value: For the nine months ended September 30, Warrant Liability 2016 2015 (In Thousands) Balance, January 1 $ 1,467 $ 3,372 Change in fair value of warrant liability included in earnings 187 (1,473 ) Balance, September 30 $ 1,654 $ 1,899 We revalue the warrant liability quarterly using a Black-Scholes option-pricing model, in combination with a binomial model, and we value the pricing protection features within the warrants using a Monte-Carlo simulation model. As of September 30, 2016 , the assumptions used in the option-pricing model were as follows: a common stock price as of September 30, 2016 of $7.62 , risk free interest rate of 1.15% , expected life of 5.08 years , expected volatility of 33.1% and a dividend yield of 0% . The change in fair value is primarily attributable to an increase in the price of our common stock from December 31, 2015 to September 30, 2016 .

Term Loan

Term Loan	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Term Loan	Term Loan On November 10, 2015, we entered into a credit agreement (the Credit Agreement) to obtain a three -year senior secured term loan B (the Term Loan) for $150 million . The Term Loan bears interest at the Eurodollar Rate, as defined in the Credit Agreement, ( 1% floor) plus an annual margin rate of 7.5% (an all-in rate of 8.5% from inception through September 30, 2016 ), payable quarterly. Quarterly principal payments of $375 thousand are also required. The outstanding balance as of September 30, 2016 was $148.5 million . Debt issuance costs totaling $4.4 million and a 1% debt discount are being amortized to interest expense, using the effective interest method, over the contractual life of the Term Loan. Effective interest rate for the Term Loan includes interest, amortization of issuance cost and the discount. For the nine months ended September 30, 2016 , the Company recorded $11.1 million of interest expense, including amortization of the issuance cost and discount. NMIH is subject to certain quarterly covenants under the Credit Agreement. These covenants include, but are not limited to the following: a maximum debt-to-total capitalization ratio (as defined) of 35% , maximum risk-to-capital (RTC) ratio of 22.0 :1.0, liquidity (as defined) of $28.4 million as of September 30, 2016 , compliance with the PMIERs financial requirements (subject to any GSE-approved waivers), and equity requirements. This description is not intended to be complete in all respects and is qualified in its entirety by the terms of the Credit Agreement, including its covenants and events of default. We were in compliance with all covenants as of September 30, 2016 . Future principal payments for the Company's Term Loan as of September 30, 2016 are as follows: As of September 30, 2016 Principal (In thousands) 2016 $ 375 2017 1,500 2018 146,625 Total $ 148,500

Reinsurance

Reinsurance	9 Months Ended
	Sep. 30, 2016
Reinsurance Disclosures [Abstract]
Reinsurance	Reinsurance In September 2016, in order to continue to grow our business and manage insurance risk and our minimum required assets under PMIERs financial requirements, the Company entered into a quota-share reinsurance transaction with a panel of third-party reinsurers, subject to certain conditions (2016 QSR Transaction). Each of the third-party reinsurers has an insurer financial strength rating of A- or better by Standard and Poor’s Rating Services (S&P), A.M. Best or both. The GSEs and the Wisconsin Office of the Commissioner of Insurance (Wisconsin OCI) approved the 2016 QSR Transaction (subject to certain conditions), giving full capital credit under PMIERs and statutory accounting principles, respectively, for the risk ceded under the agreement. The credit that we receive under PMIERs is subject to periodic review by the GSEs. Under the 2016 QSR Transaction, effective September 1, 2016, NMIC ceded premiums related to: • 25% of existing risk written on eligible policies as of August 31, 2016; • 100% of our existing risk under our pool agreement with Fannie Mae; and • 25% of risk on eligible policies written from September 1, 2016 through December 31, 2017. Net premiums written and earned, net of reinsurance, is as follows: For the nine months ended September 30, 2016 September 30, 2015 (In Thousands) Net premiums written (1) $ 96,190 $ 68,629 Increase in unearned premiums (18,534 ) (40,003 ) Net premiums earned $ 77,656 $ 28,626 (1) Net of ceded premiums written under the 2016 QSR Transaction. The effect of reinsurance on net premiums written and earned is as follows: For the nine months ended September 30, 2016 September 30, 2015 (In Thousands) Net premiums written Direct $ 133,526 $ 68,629 Ceded (37,336 ) — Net premiums written $ 96,190 $ 68,629 Net premiums earned Direct $ 78,900 $ 28,626 Ceded (1,244 ) — Net premiums earned $ 77,656 $ 28,626 The following tables show the amounts ceded related to the 2016 QSR Transaction: For the nine months ended September 30, 2016 September 30, 2015 (In Thousands) Ceded risk-in-force $ 1,685,145 $ — Ceded premiums written (37,336 ) — Ceded premiums earned (1,244 ) — Ceding commission written 7,795 — Ceding commission earned (530 ) — NMIC receives a 20% ceding commission for premiums ceded pursuant to this transaction. NMIC will also receive a profit commission, provided that the loss ratio on the loans covered under the agreement generally remains below 60% , as measured annually. Losses on the ceded risk reduce NMIC's profit commission on a dollar-for-dollar basis. In accordance with the terms of the 2016 QSR Transaction, rather than making a cash payment or transferring investments for ceded premiums written, NMIC established a funds withheld liability, which also includes amounts due to NMIC for ceding and profit commissions. Any loss recoveries and any potential profit commission to NMIC will be realized from this account until exhausted. Ceded premiums written are recorded on the balance sheet as prepaid reinsurance premiums and amortized to ceded premiums earned in a manner consistent with the recognition of income on direct premiums. The reinsurance recoverable on loss reserves related to our 2016 QSR Transaction was $90 thousand as of September 30, 2016 . The reinsurance recoverable balance is further secured by trust accounts established and maintained by each reinsurer in accordance with the PMIERs funding requirements that address ceded risk. The agreement is scheduled to terminate on December 31, 2027, except with respect to the ceded pool risk, which is scheduled to terminate on August 31, 2023. However, NMIC has the option, based on certain conditions and subject to a termination fee, to terminate the agreement as of December 31, 2020, or at the end of any calendar quarter thereafter, which would result in NMIC reassuming the related risk.

Reserves for Insurance Claims a

Reserves for Insurance Claims and Claim Expenses	9 Months Ended
	Sep. 30, 2016
Insurance [Abstract]
Reserves for Insurance Claims and Claim Expenses	Reserves for Insurance Claims and Claims Expenses We establish claim reserves to recognize the estimated liability for insurance claims and claim expenses related to defaults on insured mortgage loans. Our method, consistent with industry practice, is to establish claim reserves only for loans that have been reported to us as having been in default for at least 60 days. Our claim reserves also include amounts for estimated claims incurred on loans that have been in default for at least 60 days that have not yet been reported to us by the servicers, often referred to as IBNR. As of September 30, 2016 , we have established reserves for insurance claims and claims expenses of $2.1 million for 115 primary loans in default. We paid 3 claims totaling $93 thousand during the quarter ended September 30, 2016 . In 2013, we entered into a pool insurance transaction with Fannie Mae. We only establish claim or IBNR reserves for pool risk if we expect claims to exceed the deductible under the pool agreement, which represents the amount of claims absorbed by Fannie Mae before we are obligated to pay any claims. At September 30, 2016 , 46 loans in the pool were past due by 60 days or more. These 46 loans represent approximately $3.2 million in risk-in-force (RIF). Due to the size of the remaining deductible of $10.2 million , the low level of notices of default (NODs) reported through September 30, 2016 and the expected severity (all loans in the pool have loan-to-value ratios (LTVs) under 80% ), we have not established any pool reserves for claims or IBNR for the three and nine months ended September 30, 2016 and 2015 . In connection with settlement of pool claims, we applied $165 thousand to the pool deductible through September 30, 2016 . We have not paid any pool claims to date. The following table provides a reconciliation of the beginning and ending reserve balances for primary insurance claims and claims expenses: For the nine months ended September 30, 2016 2015 (In Thousands) Beginning balance $ 679 $ 83 Less reinsurance recoverables (1) — Beginning balance, net of reinsurance recoverables 679 83 Add claims incurred: Claims and claim expenses incurred: Current year (2) 1,803 358 Prior years (3) (214 ) (79 ) Total claims and claims expenses incurred 1,589 279 Less claims paid: Claims and claim expenses paid: Current year (2) — — Prior years (3) 225 4 Total claims and claim expenses paid 225 4 Reserve at end of period, net of reinsurance recoverables 2,043 358 Add reinsurance recoverables (1) 90 — Balance, September 30 $ 2,133 $ 358 (1) Related to ceded losses recoverable on the 2016 QSR Transaction. To date, ceded losses have been immaterial. See Note 5 for additional information. (2) Related to defaults occurring in the current year. (3) Related to defaults occurring in prior years. There was a $214 thousand favorable prior year development during the nine months ended September 30, 2016 as a result of NOD cures and ongoing analysis of recent loss development trends. We may increase or decrease our original estimates as we learn additional information about individual defaults and claims. There were $240 thousand of reserves remaining for defaults occurring in prior years as of September 30, 2016 as a result of the aforementioned favorable prior year development and claim payments.

Earnings (Loss) Per Share (EPS)

Earnings (Loss) Per Share (EPS)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings (Loss) Per Share (EPS)	Earnings (Loss) per Share (EPS) Basic earnings (loss) per share is based on the weighted average number of shares of common stock outstanding, while diluted earning (loss) per share is based on the weighted average number of shares of common stock outstanding and common stock equivalents that would be issuable upon the exercise of stock options, other share-based compensation arrangements, and the dilutive effect of outstanding warrants. The following table reconciles the net income and the weighted average shares of common stock outstanding used in the computations of basic and diluted earnings (loss) per share of common stock: For the three months ended September 30, For the nine months ended September 30, 2016 2015 2016 2015 (In Thousands, except for per share data) Net income (loss) $ 6,175 $ (4,799 ) $ 4,279 $ (22,972 ) Basic earnings (loss) per share $ 0.10 $ (0.08 ) $ 0.07 $ (0.39 ) Basic weighted average shares outstanding 59,130,401 58,741,328 59,047,758 58,650,043 Dilutive effect of non-vested shares 1,154,345 — 814,158 — Dilutive weighted average shares outstanding 60,284,746 58,741,328 59,861,916 58,650,043 Diluted earnings (loss) per share $ 0.10 $ (0.08 ) $ 0.07 $ (0.39 ) For the three and nine months ended September 30, 2016 , 4,012,046 of our common stock equivalents we issued under share-based compensation arrangements and warrants were not included in the calculation of diluted earnings (loss) per share because they were anti-dilutive. Non-vested shares of 1,154,345 and 814,158 were included in our weighted average number of common shares outstanding for the three and nine months ended September 30, 2016 , respectively. As a result of our net losses for the three and nine months ended September 30, 2015 , 6,823,234 of our common stock equivalents we issued under share-based compensation arrangements and warrants were not included in the calculation of diluted earnings (loss) per share as of such dates because they were anti-dilutive.

Warrants

Warrants	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Warrants	Warrants We issued 992,000 warrants in connection with our Private Placement. Each warrant gives the holder thereof the right to purchase one share of common stock at an exercise price equal to $10.00 . The warrants were issued with an aggregate fair value of $5.1 million . Upon exercise of these warrants, the amounts will be treated as additional paid-in capital. During the first quarter of 2014, 7,790 warrants were exercised, and we issued 1,115 Class A common shares via a cashless exercise. Upon exercise we recognized a gain of approximately $37 thousand . No warrants were exercised during the nine months ended September 30, 2016 and 2015 . We account for these warrants to purchase our common shares in accordance with ASC 470-20, Debt with Conversion and Other Options and ASC 815-40, Derivatives and Hedging - Contracts in Entity's Own Equity.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We are a U.S. taxpayer and are subject to a statutory U.S. federal corporate income tax rate of 35% . Our holding company files a consolidated U.S. federal and various state income tax returns on behalf of itself and its subsidiaries. Our provision for income taxes for the interim reporting periods are based on an estimated effective tax rate for the year ending December 31, 2016, after the consideration of expected usage of net operating losses. Our effective tax rate on our pre-tax income was 1.8% and 2.6% for the three and nine months ended September 30, 2016 , respectively, compared to 0.0% for the comparable 2015 periods. The increase in the effective tax rates for the three and nine months ended September 30, 2016, against the comparable 2015 period was the result of income reported in the current year periods.

Statutory Information

Statutory Information	9 Months Ended
	Sep. 30, 2016
Insurance [Abstract]
Statutory Information	Statutory Information Our insurance subsidiaries, NMIC and Re One, file financial statements in conformity with statutory basis accounting principles (SAP) prescribed or permitted by the Wisconsin OCI, NMIC's principal regulator. Prescribed SAP includes state laws, regulations and general administrative rules, as well as a variety of publications of the National Association of Insurance Commissioners. The Wisconsin OCI recognizes only statutory accounting practices prescribed or permitted by the state of Wisconsin for determining and reporting the financial condition and results of operations of an insurance company and for determining its solvency under Wisconsin insurance laws. NMIC and Re One's combined statutory net loss, statutory surplus, contingency reserve and risk-to-capital (RTC) ratios were as follows: As of and for the nine months and year ended September 30, 2016 December 31, 2015 (In Thousands) Statutory net loss $ (23,808 ) $ (52,322 ) Statutory surplus 367,987 391,422 Contingency reserve 72,014 32,564 Risk-to-Capital 11.7:1 8.7:1 NMIH is not subject to any limitations on its ability to pay dividends except those generally applicable to corporations that are incorporated in Delaware, such as NMIH. Delaware corporation law provides that dividends are only payable out of a corporation's capital surplus or recent net profits (subject to certain limitations). Since inception, NMIC has not paid any dividends to NMIH. As NMIC had a statutory net loss for the year ended December 31, 2015, NMIC cannot pay any dividends to NMIH through December 31, 2016, without the prior approval of the Wisconsin OCI.

Organization and Basis of Pre19

Organization and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements, which include the results of NMIH and its wholly owned subsidiaries, have been prepared in accordance with the instructions to Form 10-Q as prescribed by the SEC for interim reporting and include other information and disclosures required by accounting principles generally accepted in the U.S. (GAAP). Our accounts are maintained in U.S. dollars. These statements should be read in conjunction with our consolidated financial statements and notes thereto for the year ended December 31, 2015 , included in our 2015 10-K. All intercompany transactions have been eliminated. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, as well as disclosure of contingent assets and liabilities as of the balance sheet date. Estimates also affect the reported amounts of income and expenses for the reporting period. Actual results could differ from those estimates. The results of operations for the interim period may not be indicative of the results that may be expected for the full year ending December 31, 2016 .
Deferred Policy Acquisition Costs	Deferred Policy Acquisition Costs Costs directly associated with the successful acquisition of mortgage insurance policies, consisting of certain selling expenses and other policy issuance and underwriting expenses, are initially deferred and reported as deferred policy acquisition costs (DAC). DAC is reviewed periodically to determine that it does not exceed recoverable amounts and is adjusted as appropriate for policy cancellations to be consistent with our revenue recognition policy. We estimate the rate of amortization to reflect actual experience and any changes to persistency or loss development. For each book year of business, these costs are amortized to expense in proportion to estimated gross profits over the estimated life of the policies.
Premium Deficiency Reserves	Premium Deficiency Reserves We consider whether a premium deficiency exists at each fiscal quarter using best estimate assumptions as of the testing date. Per Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 944, a premium deficiency reserve shall be recognized if the sum of expected claim costs and claim adjustment expenses, expected dividends to policyholders, unamortized acquisition costs and maintenance costs exceeds related unearned premiums and anticipated investment income.
Reinsurance	Reinsurance We account for premiums, losses and loss expenses that are ceded to reinsurers on bases consistent with those we use to account for the original policies we issue and pursuant to the terms of our reinsurance contracts. We account for premiums ceded to reinsurers as reductions to premium revenue. We earn profit commissions, which represent a percentage of the profits recognized by the reinsurers that are returned to us, based on the level of losses ceded. We recognize any profit commissions we earn as increases in net premium revenue. We receive ceding commissions, calculated as a percentage of ceded written premiums, which are intended to cover our costs to acquire and service the direct policies. We earn the ceding commissions in a manner consistent with our recognition of earnings on the underlying insurance policies, over the terms of the policies reinsured. We account for ceding commissions as reductions to underwriting and operating expenses. We cede a portion of loss reserves, paid losses and loss expenses, which are accounted for as reductions to loss expense and as reinsurance recoverables. We remain directly liable for all loss payments in the event we are unable to collect from any reinsurer.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606). This update is intended to provide a consistent approach in recognizing revenue. In accordance with the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, the new standard requires that reporting companies disclose the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. In August 2015, ASU 2015-14 deferred the provisions of ASU 2014-09 to be effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the impact the adoption of this ASU will have, if any, on the consolidated financial statements. In August 2014, the FASB issued an update that requires an entity's management to evaluate whether there is substantial doubt about that entity's ability to continue as a going concern and, if so, disclose that fact. An entity's management will also be required to evaluate and disclose whether its plans alleviate that doubt. The guidance is effective for annual periods ending after December 15, 2016 and for interim and annual periods thereafter. We do not expect the adoption of this update to have a material effect on the presentation of our financial statements and notes therein. In May 2015, the FASB issued ASU 2015-09, Disclosures about Short-Duration Contracts (Topic 944), which requires insurance entities to disclose additional information related to the liability for unpaid claims and claims adjustment expenses. These disclosures include the nature, amount, timing and uncertainty of cash flows related to those liabilities and the effects of those cash flows on comprehensive income. This update is effective for annual periods beginning after December 15, 2015 and interim periods within annual periods beginning after December 15, 2016. We do not expect the adoption of this update to have a material effect on the presentation of our financial statements and notes therein. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This update requires that businesses recognize rights and obligations associated with certain leases as assets and liabilities on the balance sheet. The standard also requires additional disclosures regarding the amount, timing, and uncertainty of cash flows arising from leases. For public business entities, this update is effective for annual periods beginning after December 15, 2018, and interim periods therein. Early adoption is permitted in any period. The Company is currently evaluating the impact the adoption of this ASU will have on the consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Compensation-Stock Compensation (Topic 718). This update is intended to provide improvements to employee share-based payment accounting. The areas for simplification in the update involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. For public business entities, the amendments in this update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any period. The Company is currently evaluating the impact the adoption of this ASU will have on the consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326). This update requires companies to measure all expected credit losses for financial assets held at the reporting date. The accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration also is amended in the standard. The standard will take effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently evaluating the impact the adoption of this ASU will have on the presentation of the consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230). This update is intended to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The standard will take effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company is currently evaluating the impact the adoption of this ASU will have on the presentation of the consolidated financial statements.
Earnings Per Share	Basic earnings (loss) per share is based on the weighted average number of shares of common stock outstanding, while diluted earning (loss) per share is based on the weighted average number of shares of common stock outstanding and common stock equivalents that would be issuable upon the exercise of stock options, other share-based compensation arrangements, and the dilutive effect of outstanding warrants.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of Fair Values and Gross Unrealized Gains and Losses	Fair Values and Gross Unrealized Gains and Losses on Investments Amortized Gross Unrealized Fair Gains Losses As of September 30, 2016 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 57,338 $ 552 $ (13 ) $ 57,877 Municipal debt securities 40,057 919 (43 ) 40,933 Corporate debt securities 336,113 10,443 (227 ) 346,329 Asset-backed securities 120,429 1,706 (66 ) 122,069 Total bonds 553,937 13,620 (349 ) 567,208 Short-term investments 74,272 93 (1 ) 74,364 Total investments $ 628,209 $ 13,713 $ (350 ) $ 641,572 Amortized Gross Unrealized Fair Gains Losses As of December 31, 2015 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 84,968 $ 4 $ (490 ) $ 84,482 Municipal debt securities 20,209 44 (174 ) 20,079 Corporate debt securities 337,273 431 (4,377 ) 333,327 Asset-backed securities 101,320 76 (603 ) 100,793 Total bonds 543,770 555 (5,644 ) 538,681 Short-term investments 20,549 5 — 20,554 Total investments $ 564,319 $ 560 $ (5,644 ) $ 559,235
Schedule of Investments by Maturity	The amortized cost and fair values of available for sale securities as of September 30, 2016 and December 31, 2015 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Because most asset-backed securities provide for periodic payments throughout their lives, they are listed below in separate categories. As of September 30, 2016 Amortized Fair (In Thousands) Due in one year or less $ 100,443 $ 100,556 Due after one through five years 158,761 161,063 Due after five through ten years 238,559 248,040 Due after ten years 10,017 9,844 Asset-backed securities 120,429 122,069 Total investments $ 628,209 $ 641,572 As of December 31, 2015 Amortized Fair (In Thousands) Due in one year or less $ 62,745 $ 62,743 Due after one through five years 187,633 186,629 Due after five through ten years 193,379 190,055 Due after ten years 19,242 19,015 Asset-backed securities 101,320 100,793 Total investments $ 564,319 $ 559,235
Schedule of Aging Unrealized Losses	For those securities in an unrealized loss position, the length of time the securities were in such a position is as follows: Less Than 12 Months 12 Months or Greater Total # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses As of September 30, 2016 (Dollars in Thousands) U.S. Treasury securities and obligations of U.S. government agencies 10 $ 6,915 $ (13 ) — $ — $ — 10 $ 6,915 $ (13 ) Municipal debt securities 4 3,582 (18 ) 1 1,725 (25 ) 5 5,307 (43 ) Corporate debt securities 5 11,183 (24 ) 8 14,085 (203 ) 13 25,268 (227 ) Asset-backed securities 10 14,481 (59 ) 4 2,192 (7 ) 14 16,673 (66 ) Total investments 29 $ 36,161 $ (114 ) 13 $ 18,002 $ (235 ) 42 $ 54,163 $ (349 ) Less Than 12 Months 12 Months or Greater Total # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses # of Securities Fair Value Unrealized Losses As of December 31, 2015 (Dollars in Thousands) U.S. Treasury securities and obligations of U.S. government agencies 14 $ 50,558 $ (397 ) 4 $ 10,194 $ (93 ) 18 $ 60,752 $ (490 ) Municipal debt securities 4 11,293 (165 ) 1 3,242 (9 ) 5 14,535 (174 ) Corporate debt securities 83 244,128 (4,124 ) 4 9,220 (253 ) 87 253,348 (4,377 ) Asset-backed securities 27 69,878 (498 ) 4 9,208 (105 ) 31 79,086 (603 ) Total investments 128 $ 375,857 $ (5,184 ) 13 $ 31,864 $ (460 ) 141 $ 407,721 $ (5,644 )
Net Investment Income	Net Investment Income For the three months ended September 30, For the nine months ended September 30, 2016 2015 2016 2015 (In Thousands) Investment income $ 3,727 $ 2,012 $ 10,672 $ 5,537 Investment expenses (183 ) (128 ) (555 ) (369 ) Net investment income $ 3,544 $ 1,884 $ 10,117 $ 5,168
Net Realized Investments Gains (Losses)	Net Realized Investment Gains (Losses) For the three months ended September 30, For the nine months ended September 30, 2016 2015 2016 2015 (In Thousands) Gross realized investment gains $ 66 $ 266 $ 683 $ 1,526 Gross realized investment losses — (281 ) (1,441 ) (574 ) Net realized investment gains (losses) $ 66 $ (15 ) $ (758 ) $ 952

Fair Value of Financial Instr21

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	The following is a list of those assets and liabilities that are measured at fair value by hierarchy level: Fair Value Measurements Using Quoted Prices in Significant Other Significant Fair Value As of September 30, 2016 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 45,398 $ 12,479 $ — $ 57,877 Municipal debt securities — 40,933 — 40,933 Corporate debt securities — 346,329 — 346,329 Asset-backed securities — 122,069 — 122,069 Cash, cash equivalents and short-term investments 118,886 — — 118,886 Total assets $ 164,284 $ 521,810 $ — $ 686,094 Warrant liability — — 1,654 1,654 Total liabilities $ — $ — $ 1,654 $ 1,654 Fair Value Measurements Using Quoted Prices in Significant Other Significant Fair Value As of December 31, 2015 (In Thousands) U.S. Treasury securities and obligations of U.S. government agencies $ 65,185 $ 19,297 $ — $ 84,482 Municipal debt securities — 20,079 — 20,079 Corporate debt securities — 333,327 — 333,327 Asset-backed securities — 100,793 — 100,793 Cash, cash equivalents and short-term investments 77,872 — — 77,872 Total assets $ 143,057 $ 473,496 $ — $ 616,553 Warrant liability — — 1,467 1,467 Total liabilities $ — $ — $ 1,467 $ 1,467
Roll-Forward of Level 3 Liabilities Measured at Fair Value	The following is a roll-forward of Level 3 liabilities measured at fair value: For the nine months ended September 30, Warrant Liability 2016 2015 (In Thousands) Balance, January 1 $ 1,467 $ 3,372 Change in fair value of warrant liability included in earnings 187 (1,473 ) Balance, September 30 $ 1,654 $ 1,899

Term Loan (Tables)

Term Loan (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of Future Principal Payments	Future principal payments for the Company's Term Loan as of September 30, 2016 are as follows: As of September 30, 2016 Principal (In thousands) 2016 $ 375 2017 1,500 2018 146,625 Total $ 148,500

Reinsurance (Tables)

Reinsurance (Tables)	9 Months Ended
	Sep. 30, 2016
Reinsurance Disclosures [Abstract]
Effects of Reinsurance	Net premiums written and earned, net of reinsurance, is as follows: For the nine months ended September 30, 2016 September 30, 2015 (In Thousands) Net premiums written (1) $ 96,190 $ 68,629 Increase in unearned premiums (18,534 ) (40,003 ) Net premiums earned $ 77,656 $ 28,626 (1) Net of ceded premiums written under the 2016 QSR Transaction. The effect of reinsurance on net premiums written and earned is as follows: For the nine months ended September 30, 2016 September 30, 2015 (In Thousands) Net premiums written Direct $ 133,526 $ 68,629 Ceded (37,336 ) — Net premiums written $ 96,190 $ 68,629 Net premiums earned Direct $ 78,900 $ 28,626 Ceded (1,244 ) — Net premiums earned $ 77,656 $ 28,626 The following tables show the amounts ceded related to the 2016 QSR Transaction: For the nine months ended September 30, 2016 September 30, 2015 (In Thousands) Ceded risk-in-force $ 1,685,145 $ — Ceded premiums written (37,336 ) — Ceded premiums earned (1,244 ) — Ceding commission written 7,795 — Ceding commission earned (530 ) —

Reserves for Insurance Claims24

Reserves for Insurance Claims and Claim Expenses (Tables)	9 Months Ended
	Sep. 30, 2016
Insurance [Abstract]
Reconciliation of Liability for Insurance Claims and Claims Expenses	The following table provides a reconciliation of the beginning and ending reserve balances for primary insurance claims and claims expenses: For the nine months ended September 30, 2016 2015 (In Thousands) Beginning balance $ 679 $ 83 Less reinsurance recoverables (1) — Beginning balance, net of reinsurance recoverables 679 83 Add claims incurred: Claims and claim expenses incurred: Current year (2) 1,803 358 Prior years (3) (214 ) (79 ) Total claims and claims expenses incurred 1,589 279 Less claims paid: Claims and claim expenses paid: Current year (2) — — Prior years (3) 225 4 Total claims and claim expenses paid 225 4 Reserve at end of period, net of reinsurance recoverables 2,043 358 Add reinsurance recoverables (1) 90 — Balance, September 30 $ 2,133 $ 358 (1) Related to ceded losses recoverable on the 2016 QSR Transaction. To date, ceded losses have been immaterial. See Note 5 for additional information. (2) Related to defaults occurring in the current year. (3) Related to defaults occurring in prior years.

Earnings (Loss) Per Share (EP25

Earnings (Loss) Per Share (EPS) (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table reconciles the net income and the weighted average shares of common stock outstanding used in the computations of basic and diluted earnings (loss) per share of common stock: For the three months ended September 30, For the nine months ended September 30, 2016 2015 2016 2015 (In Thousands, except for per share data) Net income (loss) $ 6,175 $ (4,799 ) $ 4,279 $ (22,972 ) Basic earnings (loss) per share $ 0.10 $ (0.08 ) $ 0.07 $ (0.39 ) Basic weighted average shares outstanding 59,130,401 58,741,328 59,047,758 58,650,043 Dilutive effect of non-vested shares 1,154,345 — 814,158 — Dilutive weighted average shares outstanding 60,284,746 58,741,328 59,861,916 58,650,043 Diluted earnings (loss) per share $ 0.10 $ (0.08 ) $ 0.07 $ (0.39 )

Statutory Information (Tables)

Statutory Information (Tables)	9 Months Ended
	Sep. 30, 2016
Insurance [Abstract]
Schedule of Statutory Net Loss, Surplus, Contingency Reserve and Risk-to-Capital Ratio	NMIC and Re One's combined statutory net loss, statutory surplus, contingency reserve and risk-to-capital (RTC) ratios were as follows: As of and for the nine months and year ended September 30, 2016 December 31, 2015 (In Thousands) Statutory net loss $ (23,808 ) $ (52,322 ) Statutory surplus 367,987 391,422 Contingency reserve 72,014 32,564 Risk-to-Capital 11.7:1 8.7:1

Organization and Basis of Pre27

Organization and Basis of Presentation (Details)	1 Months Ended		9 Months Ended
	Nov. 30, 2013shares	Apr. 30, 2012USD ($)shares	Sep. 30, 2016USD ($)state	Sep. 30, 2015USD ($)
Business Acquisition [Line Items]
Proceeds from issuance of common stock, net of stock issuance costs		$ 510,000,000
Number of states in which the entity operates | state			50
Deferred policy acquisition cost, amortization expense			$ 3,400,000	$ 1,800,000
Premium deficiency reserve			$ 0	$ 0
IPO
Business Acquisition [Line Items]
Stock issued during period, shares, net issues (in shares) | shares	2,400,000
MAC Financial Holding Corporation and Subsidiaries
Business Acquisition [Line Items]
Consideration transferred, cash and equity interests issued and issuable		8,500,000
Consideration transferred, liabilities incurred		$ 1,300,000
Common Stock - Class A
Business Acquisition [Line Items]
Stock issued during period, shares, net issues (in shares) | shares		55,000,000

Investments - Fair Values and G

Investments - Fair Values and Gross Unrealized Gains and Losses on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 628,209	$ 564,319
Gross Unrealized Gains	13,713	560
Gross Unrealized (Losses)	(350)	(5,644)
Fair Value	641,572	559,235
U.S. Treasury securities and obligations of U.S. government agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	57,338	84,968
Gross Unrealized Gains	552	4
Gross Unrealized (Losses)	(13)	(490)
Fair Value	57,877	84,482
Municipal debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	40,057	20,209
Gross Unrealized Gains	919	44
Gross Unrealized (Losses)	(43)	(174)
Fair Value	40,933	20,079
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	336,113	337,273
Gross Unrealized Gains	10,443	431
Gross Unrealized (Losses)	(227)	(4,377)
Fair Value	346,329	333,327
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	120,429	101,320
Gross Unrealized Gains	1,706	76
Gross Unrealized (Losses)	(66)	(603)
Fair Value	122,069	100,793
Bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	553,937	543,770
Gross Unrealized Gains	13,620	555
Gross Unrealized (Losses)	(349)	(5,644)
Fair Value	567,208	538,681
Short-term investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	74,272	20,549
Gross Unrealized Gains	93	5
Gross Unrealized (Losses)	(1)	0
Fair Value	$ 74,364	$ 20,554

Investments - Scheduled Maturit

Investments - Scheduled Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Amortized Cost
Due in one year or less	$ 100,443	$ 62,745
Due after one through five years	158,761	187,633
Due after five through ten years	238,559	193,379
Due after ten years	10,017	19,242
Asset-backed securities	120,429	101,320
Amortized Cost	628,209	564,319
Fair Value
Due in one year or less	100,556	62,743
Due after one through five years	161,063	186,629
Due after five through ten years	248,040	190,055
Due after ten years	9,844	19,015
Asset-backed securities	122,069	100,793
Fair Value	$ 641,572	$ 559,235

Investments - Narrative (Detail

Investments - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Unrealized loss position, accumulated loss	$ 349	$ 5,644
Unrealized losses, 12 months or greater	235	460
U.S. Treasury securities and obligations of U.S. government agencies
Schedule of Available-for-sale Securities [Line Items]
Cash and investments held with various state insurance departments	6,900	7,000
Unrealized loss position, accumulated loss	13	490
Unrealized losses, 12 months or greater	$ 0	$ 93

Investments - Unrealized Losses

Investments - Unrealized Losses (Details) $ in Thousands	Sep. 30, 2016USD ($)security	Dec. 31, 2015USD ($)security
Schedule of Available-for-sale Securities [Line Items]
Number of securities, less than 12 months | security	29	128
Fair value, less than 12 months	$ 36,161	$ 375,857
Unrealized losses, less than 12 months	$ (114)	$ (5,184)
Number of securities,12 months or greater | security	13	13
Fair value, 12 months or greater	$ 18,002	$ 31,864
Unrealized losses, 12 months or greater	$ (235)	$ (460)
Number of securities, total | security	42	141
Fair value	$ 54,163	$ 407,721
Unrealized Losses	$ (349)	$ (5,644)
U.S. Treasury securities and obligations of U.S. government agencies
Schedule of Available-for-sale Securities [Line Items]
Number of securities, less than 12 months | security	10	14
Fair value, less than 12 months	$ 6,915	$ 50,558
Unrealized losses, less than 12 months	$ (13)	$ (397)
Number of securities,12 months or greater | security	0	4
Fair value, 12 months or greater	$ 0	$ 10,194
Unrealized losses, 12 months or greater	$ 0	$ (93)
Number of securities, total | security	10	18
Fair value	$ 6,915	$ 60,752
Unrealized Losses	$ (13)	$ (490)
Municipal debt securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities, less than 12 months | security	4	4
Fair value, less than 12 months	$ 3,582	$ 11,293
Unrealized losses, less than 12 months	$ (18)	$ (165)
Number of securities,12 months or greater | security	1	1
Fair value, 12 months or greater	$ 1,725	$ 3,242
Unrealized losses, 12 months or greater	$ (25)	$ (9)
Number of securities, total | security	5	5
Fair value	$ 5,307	$ 14,535
Unrealized Losses	$ (43)	$ (174)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities, less than 12 months | security	5	83
Fair value, less than 12 months	$ 11,183	$ 244,128
Unrealized losses, less than 12 months	$ (24)	$ (4,124)
Number of securities,12 months or greater | security	8	4
Fair value, 12 months or greater	$ 14,085	$ 9,220
Unrealized losses, 12 months or greater	$ (203)	$ (253)
Number of securities, total | security	13	87
Fair value	$ 25,268	$ 253,348
Unrealized Losses	$ (227)	$ (4,377)
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities, less than 12 months | security	10	27
Fair value, less than 12 months	$ 14,481	$ 69,878
Unrealized losses, less than 12 months	$ (59)	$ (498)
Number of securities,12 months or greater | security	4	4
Fair value, 12 months or greater	$ 2,192	$ 9,208
Unrealized losses, 12 months or greater	$ (7)	$ (105)
Number of securities, total | security	14	31
Fair value	$ 16,673	$ 79,086
Unrealized Losses	$ (66)	$ (603)

Investments Investments - Net I

Investments Investments - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investment Income, Net [Abstract]
Investment income	$ 3,727	$ 2,012	$ 10,672	$ 5,537
Investment expenses	(183)	(128)	(555)	(369)
Net investment income	$ 3,544	$ 1,884	$ 10,117	$ 5,168

Investments - Net Realized Inve

Investments - Net Realized Investment Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Gross realized investment gains	$ 66	$ 266	$ 683	$ 1,526
Gross realized investment losses	0	(281)	(1,441)	(574)
Net realized investment gains (losses)	$ 66	$ (15)	$ (758)	$ 952

Fair Value of Financial Instr34

Fair Value of Financial Instruments - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 641,572	$ 559,235
Warrant liability	1,654	1,467
U.S. Treasury securities and obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,877	84,482
Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	40,933	20,079
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	346,329	333,327
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	122,069	100,793
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and short-term investments	118,886	77,872
Total assets	686,094	616,553
Warrant liability	1,654	1,467
Total liabilities	1,654	1,467
Fair Value, Measurements, Recurring | U.S. Treasury securities and obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57,877	84,482
Fair Value, Measurements, Recurring | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	40,933	20,079
Fair Value, Measurements, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	346,329	333,327
Fair Value, Measurements, Recurring | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	122,069	100,793
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and short-term investments	118,886	77,872
Total assets	164,284	143,057
Warrant liability	0	0
Total liabilities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities and obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	45,398	65,185
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and short-term investments	0	0
Total assets	521,810	473,496
Warrant liability	0	0
Total liabilities	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities and obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	12,479	19,297
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	40,933	20,079
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	346,329	333,327
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	122,069	100,793
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and short-term investments	0	0
Total assets	0	0
Warrant liability	1,654	1,467
Total liabilities	1,654	1,467
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities and obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0	$ 0

Fair Value of Financial Instr35

Fair Value of Financial Instruments - Rollforward of Level 3 (Details) - Significant Unobservable Inputs (Level 3) - Warrant Liability - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,467	$ 3,372
Change in fair value of warrant liability included in earnings	187	(1,473)
Ending balance	$ 1,654	$ 1,899

Fair Value of Financial Instr36

Fair Value of Financial Instruments - Narrative (Details) - Warrant Liability - Significant Unobservable Inputs (Level 3)	9 Months Ended
	Sep. 30, 2016$ / shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Share Price (in dollars per share)	$ 7.62
Risk free rate	1.15%
Expected term	5 years 29 days
Volatility assumption	33.10%
Expected dividend rate	0.00%

Term Loan - Narrative (Details)

Term Loan - Narrative (Details) - USD ($)	Nov. 10, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016
Debt Instrument [Line Items]
Term loan		$ 148,500,000		$ 148,500,000		$ 148,500,000
Interest expense		3,733,000	$ 0	11,072,000	$ 0
Senior Secured Debt | Credit Agreement
Debt Instrument [Line Items]
Debt instrument term	3 years
Debt instrument, face amount	$ 150,000,000
Periodic payment of principal	375,000
Term loan		$ 148,500,000		$ 148,500,000		$ 148,500,000
Debt issuance cost	$ 4,400,000
Percentage of debt discount	1.00%
Debt instrument covenant, maximum debt-to-total capitalization ratio				35.00%
Debt instrument covenant, maximum risk-to-capital ratio				22
Debt instrument covenant, minimum liquidity requirement				$ 28,400,000
Senior Secured Debt | Credit Agreement | Eurodollar
Debt Instrument [Line Items]
Variable rate floor	1.00%
Basis spread on variable rate	7.50%
Interest rate during period						8.50%

Term Loan - Schedule of Future

Term Loan - Schedule of Future Principal Payments (Details) $ in Thousands	Sep. 30, 2016USD ($)
Future Principal Payments [Abstract]
2,016	$ 375
2,017	1,500
2,018	146,625
Total	$ 148,500

Reinsurance (Details)

Reinsurance (Details) - USD ($) $ in Thousands	Sep. 01, 2016	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Ceded Credit Risk [Line Items]
Reinsurance recoverable on loss reserves		$ 90	$ 0	$ 0
Third-Party Reinsurers
Ceded Credit Risk [Line Items]
Ceding commissions under 2016 QSR Transaction	20.00%
Threshold for loss ratio on loans under 2016 QSR Transaction to qualify for profit commission	60.00%
Reinsurance recoverable on loss reserves		$ 90
Existing Risk Written Policies | Third-Party Reinsurers
Ceded Credit Risk [Line Items]
Percent of policies ceded under 2016 QSR Transaction	25.00%
Fannie Mae | Third-Party Reinsurers
Ceded Credit Risk [Line Items]
Percent of policies ceded under 2016 QSR Transaction	100.00%
Risk Written Policies from September 1, 2016 through December 31, 2017 | Third-Party Reinsurers
Ceded Credit Risk [Line Items]
Percent of policies ceded under 2016 QSR Transaction	25.00%

Reinsurance - Net Premium Writt

Reinsurance - Net Premium Written and Earned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reinsurance Disclosures [Abstract]
Net premiums written			$ 96,190	$ 68,629
Increase in unearned premiums			(18,534)	(40,003)
Net premiums earned	$ 31,808	$ 12,834	$ 77,656	$ 28,626

Reinsurance - Effect of Reinsur

Reinsurance - Effect of Reinsurance on Net Premiums Written and Earned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net premiums written
Direct			$ 133,526	$ 68,629
Ceded			(37,336)	0
Net premiums written			96,190	68,629
Net premiums earned
Direct			78,900	28,626
Ceded			(1,244)	0
Net premiums earned	$ 31,808	$ 12,834	$ 77,656	$ 28,626

Reinsurance - Amounts Ceded Rel

Reinsurance - Amounts Ceded Related to 2016 QSR Transaction (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Ceded Credit Risk [Line Items]
Ceded premiums written	$ (37,336)	$ 0
Ceded premiums earned	(1,244)	$ 0
Third-Party Reinsurers
Ceded Credit Risk [Line Items]
Ceded risk-in-force	1,685,145
Ceded premiums written	(37,336)
Ceded premiums earned	(1,244)
Ceding commission written	7,795
Ceding commission earned	$ (530)

Reserves for Insurance Claims43

Reserves for Insurance Claims and Claim Expenses - Narrative (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016USD ($)loanclaim	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Liability for Claims and Claims Adjustment Expense [Line Items]
IBNR, default period (at least)		60 days
Liability for insurance claims	$ 2,133	$ 2,133	$ 358	$ 679	$ 83
Primary loans in default | loan	115	115
Number of claims paid | claim	3
Claims paid	$ 93	$ 0	0
Claims applied to deductible		165
Favorable prior year development		214	$ 79
Reserve for prior year insurance claims and claim expenses	$ 240	$ 240
Fannie Mae
Liability for Claims and Claims Adjustment Expense [Line Items]
Number of loans in pool past due 60 days or more | loan	46	46
Risk in Force of loans in pool past due 60 days or more	$ 3,200	$ 3,200
Deductible on policy		$ 10,200
Loan-to-value ratio (less than)		0.8

Reserves for Insurance Claims44

Reserves for Insurance Claims and Claim Expenses - Reconciliation of Reserve Balances for Insurance Claims Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning balance		$ 679	$ 83
Less reinsurance recoverables		0
Beginning balance, net of reinsurance recoverables		679	83
Claims incurred:
Current year		1,803	358
Prior years		(214)	(79)
Total claims and claims expenses incurred		1,589	279
Claims and claim expenses paid:
Current year	$ 93	0	0
Prior years		225	4
Total claims and claim expenses paid		225	4
Ending balance, net of reinsurance recoverables	2,043	2,043	358
Add reinsurance recoverables	90	90	0
Reserve at end of period, net of reinsurance recoverables	$ 2,133	$ 2,133	$ 358

Earnings (Loss) Per Share (EP45

Earnings (Loss) Per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income (loss)	$ 6,175	$ (4,799)	$ 4,279	$ (22,972)	$ (27,793)
Basic earnings (loss) per share (in dollars per share)	$ 0.10	$ (0.08)	$ 0.07	$ (0.39)
Basic weighted average shares outstanding (in shares)	59,130,401	58,741,328	59,047,758	58,650,043
Dilutive effect of non-vested shares (in shares)	1,154,345	0	814,158	0
Dilutive weighted average shares outstanding (in shares)	60,284,746	58,741,328	59,861,916	58,650,043
Diluted earnings (loss) per share (in dollars per share)	$ 0.10	$ (0.08)	$ 0.07	$ (0.39)

Earnings (Loss) Per Share (EP46

Earnings (Loss) Per Share (EPS) - Narrative (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of non-vested shares (in shares)	1,154,345	0	814,158	0
Stock Compensation Plan and Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from EPS calculation (in shares)	4,012,046	6,823,234	4,012,046	6,823,234

Warrants (Details)

Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Apr. 30, 2012
Line of Credit Facility [Line Items]
Warrants issued (in shares)				992,000
Right to purchase, number of shares per warrant				1
Exercise price of warrants (in dollars per warrant)				$ 10
Warrants value				$ 5,100
Number of warrants exercised during period	7,790	0	0
Gain from settlement of warrants	$ 37
Common Stock - Class A | Common Stock - Class A
Line of Credit Facility [Line Items]
Issuance of Class A shares of common stock as part of cashless exercise of warrants, shares	1,115

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Federal statutory income tax rate			35.00%
Effective income tax rate on pre-tax loss	1.80%	0.00%	2.60%	0.00%

Statutory Information - Schedul

Statutory Information - Schedule of Statutory Net Loss, Surplus, Contingency Reserve and Risk-to-Capital Ratio (Details) - Combined $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Statutory Accounting Practices [Line Items]
Statutory net loss	$ (23,808)	$ (52,322)
Statutory surplus	367,987	391,422
Contingency reserve	$ 72,014	$ 32,564
Risk-to-Capital	11.7	8.7