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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Cash, Cash Equivalents and Restricted Cash | $ 826,089 | $ 632,921 |  |
Cash flows from operating activities: |  |  |  |
Net income | 70,110 | 62,070 |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Amortization | 21,620 | 21,610 |  |
Depreciation | 6,098 | 5,318 |  |
Non-cash stock-based compensation | 8,564 | 2,772 |  |
Change in estimated acquisition earn-out payables | 4,028 | (821) |  |
Deferred income taxes | 10,005 | 9,933 |  |
Amortization of debt discount | 39 | 39 |  |
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Amortization Expense | 383 | 420 |  |
Accretion (Amortization) of Discounts and Premiums, Investments | 8 | 18 |  |
Income tax benefit from exercise of shares from the stock benefit plans | 0 | (1,249) |  |
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables | (4,547) | (3,550) |  |
Net gain on sales of investments, fixed assets and customer accounts | (2) | (1,911) |  |
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures: |  |  |  |
Premiums, commissions and fees receivable decrease | 16,297 | 5,229 |  |
Reinsurance recoverables decrease (increase) | 38,844 | (26,161) |  |
Prepaid reinsurance premiums decrease | 28,521 | 29,859 |  |
Other assets decrease (increase) | 1,404 | (21,247) |  |
Premiums payable to insurance companies (decrease) | (4,383) | (21,139) |  |
Premium deposits and credits due customers increase | 7,088 | 6,238 |  |
Losses and loss adjustment reserve (decrease) increase | (38,844) | 26,161 |  |
Unearned premiums (decrease) | (28,521) | (29,859) |  |
Accounts payable increase | 45,386 | 22,962 |  |
Accrued expenses and other liabilities (decrease) | (77,325) | (50,034) |  |
Other liabilities (decrease) | (14,752) | (3,436) |  |
Net cash provided by operating activities | 90,021 | 33,222 |  |
Cash flows from investing activities: |  |  |  |
Additions to fixed assets | (3,032) | (4,252) |  |
Payments for businesses acquired, net of cash acquired | 0 | (40,603) |  |
Proceeds from sales of fixed assets and customer accounts | 589 | 2,467 |  |
Purchases of investments | (379) | (10,106) |  |
Proceeds from Sale, Maturity and Collection of Investments | 679 | 7,604 |  |
Net cash used in investing activities | (2,143) | (44,890) |  |
Cash flows from financing activities: |  |  |  |
Payments on acquisition earn-outs | (5,683) | (5,527) |  |
Proceeds from long-term debt | (14,250) | (6,875) |  |
Income tax benefit from exercise of shares from the stock benefit plans | 0 | 1,249 |  |
Issuances of common stock for employee stock benefit plans | 506 | 916 |  |
Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings | (4,742) | (1,385) |  |
Purchase of treasury stock | 0 | (11,250) |  |
Settlement of accelerated share repurchase program | 0 | 11,250 |  |
Cash dividends paid | (18,903) | (16,962) |  |
Net cash used in financing activities | (43,072) | (28,584) |  |
Net increase (decrease) in cash and cash equivalents inclusive of restricted cash | 44,806 | (40,252) |  |
Cash, Cash Equivalents and Restricted Cash- Beginning Balance |  |  | $ 781,283 | $ 673,173
Cash and cash equivalents inclusive of restricted cash at beginning of period | 546,721 | 401,846 | 515,646 | 443,420
Cash and Cash Equivalents inclusive of Restricted Cash [Member] |  |  |  |
Cash flows from financing activities: |  |  |  |
Cash and cash equivalents inclusive of restricted cash at beginning of period | $ 826,089 | $ 632,921 | $ 781,283 | $ 673,173

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of cash outflow to reacquire equity classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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