Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Taxes [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The components of income tax expense for continuing operations for the years ended December 31, 2016, 2015, and 2014 are as follows:

	Year Ended December 31,
	2016		2015			2014
	(In thousands)
Current expense:
Federal	$	20,237	$	25,631		$	20,557
State	7,778		9,183			7,254
Total current expense	28,015		34,814			27,811
Deferred expense/(benefit):
Federal	1,976		(3,185		)	3,895
State	972		(1,237		)	659
Total deferred expense/(benefit)	2,948		(4,422		)	4,554
Income tax expense	$	30,963	$	30,392		$	32,365

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Reconciliations between the Federal statutory income tax rate of 35% to the effective income tax rate for the years ended December 31, 2016, 2015, and 2014 are as follows:

	Year Ended December 31,
	2016		2015		2014
Statutory Federal income tax rate	35.0	%	35.0	%	35.0	%
Increase/ (decrease) resulting from:
Tax exempt interest, net	(7.5	)%	(7.1	)%	(5.6	)%
State and local income tax, net of Federal tax benefit	5.6	%	5.5	%	5.2	%
Tax credits	(2.2	)%	(1.9	)%	(1.7	)%
Noncontrolling interests	(1.4	)%	(1.6	)%	(1.7	)%
Out-of-period adjustment	—	%	1.3	%	—	%
Other, net	1.1	%	1.4	%	1.2	%
Effective income tax rate	30.6	%	32.6	%	32.4	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The components of gross deferred tax assets and gross deferred tax liabilities at December 31, 2016 and 2015 are as follows:

	December 31,
	2016		2015
	(In thousands)
Gross deferred tax assets:
Allowance for loan losses	$	35,471	$	37,401
Allowance for losses on OREO	74		912
Interest on nonaccrual loans	548		833
Stock compensation	6,079		7,391
Deferred and accrued compensation	19,801		19,370
State loss carryforward, net of federal	—		60
Capital loss carryforward	—		458
Mark-to-market on securities available-for-sale	185		274
Contingent payments	1,868		1,978
Unrealized loss on investments	8,264		748
Other	720		756
Gross deferred tax assets	73,010		70,181
Less: valuation allowance	—		458
Total deferred tax assets	73,010		69,723
Gross deferred tax liabilities:
Cancellation of debt income deferral	2,692		4,035
Goodwill and acquired intangible assets	12,929		11,894
Fixed assets	67		62
Prepaid expenses	611		580
Other	1,251		1,453
Total gross deferred tax liabilities	17,550		18,024
Net deferred tax asset	$	55,460	$	51,699

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending gross amount of unrecognized tax benefits under the provisions of ASC 740-10 is as follows:

	2016			2015			2014
	(In thousands)
Balance at January 1	$	1,022		$	1,067		$	549
Additions based on tax positions related to the current year	160			163			245
Additions based on tax positions taken in prior years	—			—			366
Decreases based on tax positions taken in prior years	—			—			—
Decreases based on settlements with taxing authorities	—			—			—
Decreases based on the expiration of statute of limitations	(208		)	(208		)	(93		)
Balance at December 31	$	974		$	1,022		$	1,067