Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense

The current and deferred components of income tax expense on the consolidated statements of income were as follows:

	For The Year Ended December 31,
	2016			2015		2014
Current:
Federal	$	17,854		$	7,956	$	11,435
State	930			71		505
	18,784			8,027		11,940
Deferred:
Federal	(1,258		)	1,356		(500		)
State	(54		)	524		—
	(1,312		)	1,880		(500		)
Income tax expense	$	17,472		$	9,907	$	11,440

Reconciliation of Expected Income Tax Benefit Computed Using Federal Statutory Income Tax Rate

The income tax expense differs from the amount computed by applying the statutory federal income tax rate as a result of the following:

	For The Year Ended December 31,
	2016			2015			2014
Computed tax expense	$	20,139		$	10,801		$	12,604
Increase (reduction) in income taxes resulting from:
Tax exempt income	(1,312		)	(1,092		)	(704		)
Income from life insurance	(908		)	(588		)	(503		)
Share-based awards(1)	(701		)	—			—
State taxes, net of federal benefit	565			373			328
Low income housing credits	(376		)	(359		)	(286		)
Non-deductible acquisition-related costs	—			467			—
Other	65			305			1
Income tax expense	$	17,472		$	9,907		$	11,440
Income before income taxes	$	57,539		$	30,859		$	36,010
Effective tax rate	30.4		%	32.1		%	31.8		%

Schedule of Deferred Tax Assets and Deferred Tax Liabilities

Temporary differences between the financial statements carrying amounts and the tax bases of assets and liabilities gave rise to the following deferred tax assets and liabilities:

	December 31,
	2016					2015
(Calculated using a 35% deferred income tax rate)	Asset		Liability			Asset		Liability
Net operating loss and tax credit carryforward	$	20,977	$	—		$	22,282	$	—
Allowance for loan losses	8,094		—			7,416		—
Pension and other benefits	5,141		—			4,488		—
Net unrealized losses on AFS securities	3,227		—			2,047		—
Net unrealized losses on derivative instruments	3,066		—			3,432		—
Purchase accounting and deposit premium	1,430		—			2,856		—
Deferred compensation and benefits	1,791		—			2,129		—
Net unrealized losses on postretirement plans	1,147		—			1,102		—
Depreciation	—		(4,520		)	—		(4,298		)
Deferred loan origination fees	—		(2,046		)	—		(1,815		)
Other	956		—			77		—
	45,829		(6,566		)	45,829		(6,113		)
Valuation allowance on deferred tax assets			—					—
Net deferred tax assets			$	39,263				$	39,716