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Amount of interest-bearing domestic certificate of deposit liabilities.

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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. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

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Fair Value Measurements - Schedule of Financial Instruments, Carrying and Fair Values (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 102,226	$ 103,762	$ 101,224	$ 103,823
Securities available for sale	964,534	1,074,395
Investment securities held to maturity	473,684	469,528
FHLBNY stock	78,181	69,789
Loans, net of allowance for loan losses	6,476,250	6,023,771
Certificates of deposit	739,721	825,689
Total deposits	5,923,987	5,792,523
Borrowings	1,707,632	1,509,851
US Treasury Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,004	8,016
Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	863,861	957,257
State and Municipal Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	4,308	7,002
Corporate Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	5,512	6,520
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	102,226	103,762
Securities available for sale	964,534	1,074,395
Investment securities held to maturity	473,684	469,528
FHLBNY stock	78,181	69,789
Loans, net of allowance for loan losses	6,476,250	6,023,771
Derivative assets	6,854	2,046
Deposits other than certificates of deposits	5,184,266	4,966,834
Certificates of deposit	739,721	825,689
Total deposits	5,923,987	5,792,523
Borrowings	1,707,632	1,509,851
Derivative liabilities	6,745	2,052
Carrying Value [Member] \| US Treasury Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,004	8,016
Carrying Value [Member] \| Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	82,330	95,076
Investment securities held to maturity	4,096	6,813
Carrying Value [Member] \| Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	863,861	957,257
Investment securities held to maturity	1,597	2,816
Carrying Value [Member] \| State and Municipal Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	4,308	7,002
Investment securities held to maturity	458,062	449,410
Carrying Value [Member] \| Corporate Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	5,512	6,520
Investment securities held to maturity	9,929	10,489
Carrying Value [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	519	524
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	102,226	103,762
Securities available for sale	964,534	1,074,395
Investment securities held to maturity	488,331	482,473
FHLBNY stock	78,181	69,789
Loans, net of allowance for loan losses	6,509,502	6,104,558
Derivative assets	6,854	2,046
Deposits other than certificates of deposits	5,184,266	4,966,834
Certificates of deposit	742,020	830,233
Total deposits	5,926,286	5,797,067
Borrowings	1,726,726	1,516,966
Derivative liabilities	6,745	2,052
Fair Value [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	102,226	103,762
Securities available for sale	90,853	103,616
Investment securities held to maturity	4,097	6,810
FHLBNY stock	78,181	69,789
Loans, net of allowance for loan losses	0	0
Deposits other than certificates of deposits	5,184,266	4,966,834
Certificates of deposit	0	0
Total deposits	5,184,266	4,966,834
Borrowings	0	0
Fair Value [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	873,681	970,779
Investment securities held to maturity	484,234	475,663
FHLBNY stock	0	0
Loans, net of allowance for loan losses	0	0
Derivative assets	6,854	2,046
Deposits other than certificates of deposits	0	0
Certificates of deposit	742,020	830,233
Total deposits	742,020	830,233
Borrowings	1,726,726	1,516,966
Derivative liabilities	6,745	2,052
Fair Value [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	0	0
Investment securities held to maturity	0	0
FHLBNY stock	0	0
Loans, net of allowance for loan losses	6,509,502	6,104,558
Deposits other than certificates of deposits	0	0
Certificates of deposit	0	0
Total deposits	0	0
Borrowings	0	0
Fair Value [Member] \| US Treasury Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,004	8,016
Fair Value [Member] \| US Treasury Obligations [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,004	8,016
Fair Value [Member] \| US Treasury Obligations [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Fair Value [Member] \| US Treasury Obligations [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Fair Value [Member] \| Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	82,330	95,076
Investment securities held to maturity	4,097	6,810
Fair Value [Member] \| Agency Obligations [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	82,330	95,076
Investment securities held to maturity	4,097	6,810
Fair Value [Member] \| Agency Obligations [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| Agency Obligations [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	863,861	957,257
Investment securities held to maturity	1,658	2,939
Fair Value [Member] \| Mortgage-Backed Securities [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| Mortgage-Backed Securities [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	863,861	957,257
Investment securities held to maturity	1,658	2,939
Fair Value [Member] \| Mortgage-Backed Securities [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| State and Municipal Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	4,308	7,002
Investment securities held to maturity	472,661	462,238
Fair Value [Member] \| State and Municipal Obligations [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| State and Municipal Obligations [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	4,308	7,002
Investment securities held to maturity	472,661	462,238
Fair Value [Member] \| State and Municipal Obligations [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| Corporate Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	5,512	6,520
Investment securities held to maturity	9,915	10,486
Fair Value [Member] \| Corporate Obligations [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| Corporate Obligations [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	5,512	6,520
Investment securities held to maturity	9,915	10,486
Fair Value [Member] \| Corporate Obligations [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	519	524
Fair Value [Member] \| Equity Securities [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	519	524
Fair Value [Member] \| Equity Securities [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Fair Value [Member] \| Equity Securities [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	$ 0	$ 0