Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands |
Jan. 01, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||||
Operating lease right-of-use assets | $ 28,900 | $ 27,500 | $ 0 | |||||||
Operating lease liabilities | 30,900 | 29,541 | [1] | 0 | ||||||
Rent-related liabilities | 2,900 | |||||||||
Cumulative effect on retained earnings, tax | 222 | |||||||||
Cumulative effect on retained earnings, net of tax | 722 | |||||||||
Held to maturity debt securities, at amortized cost | 0 | 10,415 | ||||||||
Held to maturity debt securities, fair value | 0 | 10,316 | ||||||||
Unrealized losses on held to maturity securities, net of tax | $ (8,924) | $ (11,866) | $ (28,309) | $ (39,077) | $ (35,062) | $ (23,510) | ||||
Retained Earnings [Member] | ||||||||||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||||
Cumulative effect on retained earnings, net of tax | $ 722 | |||||||||
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