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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |  |
Repayments of Lines of Credit |  |  |  |  | $ 350,000 | $ 0 |  |
Document Period End Date |  |  |  |  | Jun. 30, 2019 |  |  |
Payments of Debt Issuance Costs |  |  |  |  | $ (3,701) | 0 |  |
Cash, Cash Equivalents and Restricted Cash |  |  |  |  | 814,781 | 787,159 | $ 777,596 | $ 824,088
Cash flows from operating activities: |  |  |  |  |  |  |  |
Net income | $ 92,593 | $ 113,896 | $ 73,922 | $ 90,828 | 206,489 | 164,750 |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |
Amortization | 25,954 |  | 20,785 |  | 52,146 | 41,324 |  |
Depreciation | 5,666 |  | 5,599 |  | 11,701 | 11,151 |  |
Non-cash stock-based compensation |  |  |  |  | 24,128 | 15,027 |  |
Change in estimated acquisition earn-out payables | (2,860) |  | 419 |  | (1,650) | 2,885 |  |
Deferred income taxes |  |  |  |  | (5,342) | (16,437) |  |
Amortization of debt discount and disposal of deferred financing costs |  |  |  |  | 988 | 819 |  |
Accretion (Amortization) of Discounts and Premiums, Investments |  |  |  |  | (12) | 1 |  |
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables |  |  |  |  | (267) | (3,408) |  |
Net gain/(loss) on sales of investments, fixed assets and customer accounts |  |  |  |  | (346) | (2,432) |  |
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures: |  |  |  |  |  |  |  |
Premiums, commissions and fees receivable (increase) decrease |  |  |  |  | (71,614) | (29,471) |  |
Reinsurance recoverables (increase) decrease |  |  |  |  | (11,939) | 388,704 |  |
Prepaid reinsurance premiums (increase) decrease |  |  |  |  | (5,674) | 10,310 |  |
Other assets (increase) decrease |  |  |  |  | (22,122) | (15,731) |  |
Premiums payable to insurance companies increase (decrease) |  |  |  |  | 116,472 | 106,839 |  |
Premium deposits and credits due customers increase (decrease) |  |  |  |  | (12,003) | 8,360 |  |
Losses and loss adjustment reserve increase (decrease) |  |  |  |  | 12,123 | (388,572) |  |
Unearned premiums increase (decrease) |  |  |  |  | 5,674 | (10,310) |  |
Accounts payable increase (decrease) |  |  |  |  | 23,773 | 31,343 |  |
Accrued expenses and other liabilities increase (decrease) |  |  |  |  | (32,269) | (34,837) |  |
Other liabilities increase (decrease) |  |  |  |  | 15,447 | (2,909) |  |
Net cash provided by operating activities |  |  |  |  | 305,703 | 277,406 |  |
Cash flows from investing activities: |  |  |  |  |  |  |  |
Additions to fixed assets | (11,988) |  | (9,639) |  | (35,174) | (19,390) |  |
Payments for businesses acquired, net of cash acquired |  |  |  |  | (146,646) | (141,803) |  |
Proceeds from sales of fixed assets and customer accounts |  |  |  |  | 2,101 | 2,906 |  |
Purchases of investments |  |  |  |  | (9,265) | (8,863) |  |
Proceeds from Sale, Maturity and Collection of Investments |  |  |  |  | 4,505 | 16,346 |  |
Net cash used in investing activities |  |  |  |  | (184,479) | (150,804) |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |
Payments on acquisition earn-outs |  |  |  |  | (6,997) | (5,183) |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  | 350,000 | 0 |  |
Payments on long-term debt |  |  |  |  | (22,500) | (110,001) |  |
Issuances of common stock for employee stock benefit plans |  |  |  |  | 901 | 720 |  |
Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings |  |  |  |  | (6,861) | (7,656) |  |
Purchase of treasury stock |  |  |  |  | (20,000) | (11,250) |  |
Settlement (prepayment) of accelerated share repurchase program |  |  |  |  | 20,000 | 11,250 |  |
Cash dividends paid |  |  |  |  | (44,881) | (41,411) |  |
Net cash used in financing activities |  |  |  |  | (84,039) | (163,531) |  |
Cash and cash equivalents inclusive of restricted cash at end of period | 432,548 |  | 477,928 |  | 432,548 | 477,928 | 438,961 | 573,383
Cash and Cash Equivalents inclusive of Restricted Cash [Member] |  |  |  |  |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |  |  |
Net increase (decrease) in cash and cash equivalents inclusive of restricted cash |  |  |  |  | 37,185 | (36,929) |  |
Cash and cash equivalents inclusive of restricted cash at end of period | $ 814,781 |  | $ 787,159 |  | $ 814,781 | $ 787,159 | $ 777,596 | $ 824,088

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109223946&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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