Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Insurance commissions	$ 3,646	$ 4,519	$ 11,493	$ 13,938
(Losses) gains on securities transactions, net	(79)	6	(880)	5
Fees from loan servicing	2,573	1,895	6,841	5,541
Gains on sales of loans, net	3,748	5,520	18,143	14,439
Bank owned life insurance	2,545	1,541	6,960	5,705
Other	6,865	4,896	26,637	17,177
Total non-interest income	29,038	26,997	99,358	81,547
Trust and investment services
Disaggregation of Revenue [Line Items]
Revenue from contracts with customer	3,143	3,062	9,635	8,606
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenue from contracts with customer	$ 6,597	$ 5,558	$ 20,529	$ 16,136

Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.

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Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.

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Income from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products.

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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Amount of revenue earned, classified as other, excluding interest income.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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Servicing Fees, Net1

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