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Loans Receivable and Allowance for Loan Losses (Delinquency Status of Total Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | $ 44,108 | $ 39,316
Current |  | 2,098,008 | 1,623,493
Total Loans Receivable |  | 2,142,116 | 1,662,809
30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 21,262 | 30,252
60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 6,065 | 4,049
Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 16,781 | 5,015
Originated loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 14,760 | 33,504
Current |  | 1,851,535 | 1,519,610
Total Loans Receivable |  | 1,866,295 | 1,553,114
Originated loans [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 9,137 | 27,738
Originated loans [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 2,048 | 3,346
Originated loans [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 3,575 | 2,420
Originated loans [Member] | Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 3,272 | 5,235
Current |  | 200,389 | 177,309
Total Loans Receivable |  | 203,661 | 182,544
Originated loans [Member] | Residential [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1,649 | 1,358
Originated loans [Member] | Residential [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 406 | 1,604
Originated loans [Member] | Residential [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1,217 | 2,273
Originated loans [Member] | Commercial and Multi-family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 9,805 | 21,097
Current |  | 1,443,102 | 1,192,293
Total Loans Receivable |  | 1,452,907 | 1,213,390
Originated loans [Member] | Commercial and Multi-family [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 6,980 | 20,210
Originated loans [Member] | Commercial and Multi-family [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1,531 | 887
Originated loans [Member] | Commercial and Multi-family [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1,294 |
Originated loans [Member] | Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  |  | 5,687
Current |  | 51,599 | 44,810
Total Loans Receivable |  | 51,599 | 50,497
Originated loans [Member] | Construction [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  |  | 5,687
Originated loans [Member] | Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 954 | 904
Current | [1] | 104,147 | 65,871
Total Loans Receivable | [1] | 105,101 | 66,775
Originated loans [Member] | Commercial Business [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 192 | 161
Originated loans [Member] | Commercial Business [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 66 | 640
Originated loans [Member] | Commercial Business [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 696 | 103
Originated loans [Member] | Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 683 | 573
Current | [2] | 51,699 | 38,152
Total Loans Receivable | [2] | 52,382 | 38,725
Originated loans [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 313 | 314
Originated loans [Member] | Home Equity [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 44 | 215
Originated loans [Member] | Home Equity [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 326 | 44
Originated loans [Member] | Consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 46 | 8
Current |  | 599 | 1,175
Total Loans Receivable |  | 645 | 1,183
Originated loans [Member] | Consumer [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 3 | 8
Originated loans [Member] | Consumer [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1 |
Originated loans [Member] | Consumer [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 42 |
Acquired loans recorded at fair value [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 17,421 | 5,812
Current |  | 241,008 | 101,739
Total Loans Receivable |  | 258,429 | 107,551
Acquired loans recorded at fair value [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 11,765 | 2,514
Acquired loans recorded at fair value [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 2,997 | 703
Acquired loans recorded at fair value [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 2,659 | 2,595
Acquired loans recorded at fair value [Member] | Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 2,382 | 2,760
Current |  | 42,551 | 45,048
Total Loans Receivable |  | 44,933 | 47,808
Acquired loans recorded at fair value [Member] | Residential [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 315 | 643
Acquired loans recorded at fair value [Member] | Residential [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 284 | 379
Acquired loans recorded at fair value [Member] | Residential [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1,783 | 1,738
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 9,031 | 2,389
Current |  | 149,063 | 44,220
Total Loans Receivable |  | 158,094 | 46,609
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 5,877 | 1,539
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 2,564 |
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 590 | 850
Acquired loans recorded at fair value [Member] | Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 643 |
Current |  | 1,155 |
Total Loans Receivable |  | 1,798 |
Acquired loans recorded at fair value [Member] | Construction [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 643 |
Acquired loans recorded at fair value [Member] | Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 4,724 | 92
Current | [1] | 26,956 | 3,965
Total Loans Receivable | [1] | 31,680 | 4,057
Acquired loans recorded at fair value [Member] | Commercial Business [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 4,456 | 92
Acquired loans recorded at fair value [Member] | Commercial Business [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 21 |
Acquired loans recorded at fair value [Member] | Commercial Business [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [1] | 247 |
Acquired loans recorded at fair value [Member] | Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 641 | 571
Current | [2] | 21,084 | 8,384
Total Loans Receivable | [2] | 21,725 | 8,955
Acquired loans recorded at fair value [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 474 | 240
Acquired loans recorded at fair value [Member] | Home Equity [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 128 | 324
Acquired loans recorded at fair value [Member] | Home Equity [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due | [2] | 39 | 7
Acquired loans recorded at fair value [Member] | Consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Current |  | 199 | 122
Total Loans Receivable |  | 199 | 122
Acquired loans with deteriorated credit [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 11,927 |
Current |  | 5,465 | 2,144
Total Loans Receivable |  | 17,392 | 2,144
Acquired loans with deteriorated credit [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 360 |
Acquired loans with deteriorated credit [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1,020 |
Acquired loans with deteriorated credit [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 10,547 |
Acquired loans with deteriorated credit [Member] | Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 170 |
Current |  | 1,232 | 1,413
Total Loans Receivable |  | 1,402 | 1,413
Acquired loans with deteriorated credit [Member] | Residential [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 55 |
Acquired loans with deteriorated credit [Member] | Residential [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 115 |
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 9,896 |
Current |  | 1,984 | 731
Total Loans Receivable |  | 11,880 | $ 731
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 360 |
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 145 |
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 9,391 |
Acquired loans with deteriorated credit [Member] | Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 1,807 |
Current |  | 863 |
Total Loans Receivable |  | 2,670 |
Acquired loans with deteriorated credit [Member] | Construction [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 820 |
Acquired loans with deteriorated credit [Member] | Construction [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 987 |
Acquired loans with deteriorated credit [Member] | Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Current | [1] | 986 |
Total Loans Receivable | [1] | 986 |
Acquired loans with deteriorated credit [Member] | Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Current | [2] | 400 |
Total Loans Receivable | [2] | 400 |
Acquired loans with deteriorated credit [Member] | Consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | 54 |
Total Loans Receivable |  | 54 |
Acquired loans with deteriorated credit [Member] | Consumer [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past Due |  | $ 54 |
[1] | Includes business lines of credit.
[2] | Includes home equity lines of credit.

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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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