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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Reconciliation of Weighted Average Common Shares Outstanding | A reconciliation of weighted average common shares outstanding used to calculate basic and diluted net income per share follows:
| 2018 |  | 2017 |  | 2016
| (in thousands)
Weighted average common shares outstanding (basic) | 175,395 |  |  | 174,721 |  |  | 173,325 |
Impact of common stock equivalents | 1,148 |  |  | 1,211 |  |  | 1,093 |
Weighted average common shares outstanding (diluted) | 176,543 |  |  | 175,932 |  |  | 174,418 |
Schedule of Immaterial Corrections of Cash and Restricted Cash | The immaterial corrections of cash and restricted cash within the consolidated statements of cash flows, as shown in the following tables, had no impact on the amounts of “cash and due from banks” and “interest-bearing deposits with other banks” presented on the consolidated balance sheets.
|  | Three Months Ended March 31 |  | Six Months Ended June 30 |  | Nine Months Ended September 30
|  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
As Reported: | (in thousands)
| Decrease (increase) in other interest-earning assets | $ | 86,760 |  |  | $ | (59,135 | ) |  | $ | (3,480 | ) |  | $ | (71,845 | ) |  | $ | (49,225 | ) |  | $ | (376,696 | )
| Net cash provided by (used in) investing activities | 36,715 |  |  | (279,869 | ) |  | (217,199 | ) |  | (656,240 | ) |  | (478,766 | ) |  | (1,202,312 | )
| Net (decrease) increase in cash and restricted cash | (8,140 | ) |  | (24,919 | ) |  | (1,793 | ) |  | 5,920 |  |  | (33,465 | ) |  | (41,112 | )
| Cash and restricted cash - beginning of period | 108,291 |  |  | 118,763 |  |  | 246,726 |  |  | 236,887 |  |  | 246,726 |  |  | 236,887 |
| Cash and restricted cash - end of period | 100,151 |  |  | 93,844 |  |  | 244,933 |  |  | 242,807 |  |  | 213,261 |  |  | 195,775 |
As Corrected: |  |  |  |  |  |  |  |  |  |  |
| Decrease (increase) in other interest-earning assets | $ | 59,034 |  |  | $ | (76,087 | ) |  | $ | 4,312 |  |  | $ | (57,819 | ) |  | $ | (39,974 | ) |  | $ | (341,385 | )
| Net cash provided by (used in) investing activities | 8,989 |  |  | (296,821 | ) |  | (209,407 | ) |  | (642,214 | ) |  | (469,515 | ) |  | (1,167,001 | )
| Net (decrease) increase in cash and restricted cash | (35,866 | ) |  | (41,871 | ) |  | 5,999 |  |  | 19,946 |  |  | (24,214 | ) |  | (5,801 | )
| Cash and restricted cash - beginning of period | 159,304 |  |  | 144,812 |  |  | 159,304 |  |  | 144,812 |  |  | 159,304 |  |  | 144,812 |
| Cash and restricted cash - end of period | 123,438 |  |  | 102,941 |  |  | 165,303 |  |  | 164,758 |  |  | 135,090 |  |  | 139,011 |

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- Definition Tabular disclosure of the change in an accounting estimate, including a change that occurs in an interim period. If a change in accounting estimate affects several future periods (for example, a change in the service life of a depreciable asset) disclose the effect on income from continuing operations, net income (or other appropriate captions of changes in the applicable net assets or performance indicator), and any related per-share amounts of the current period. Disclosure of the effects of a change in an accounting estimate that occurs in the ordinary course of business (such as uncollectible accounts or inventory obsolescence) is not required, unless the effect is material. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(a)(5)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109236672&loc=d3e777-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=115929471&loc=d3e21843-107793 + Details
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