Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Financial Asset and Liabilities Measured at Fair Value on Recurring Basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to estimate the fair value at the measurement date in the tables below. See Note 1, Summary of Significant Accounting Policies, for a description of how fair value measurements are determined.

	December 31, 2015
(Dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets
Securities available for sale	$	—	$	2,800,286	$	—	$	2,800,286
Mortgage loans held for sale	—		166,247		—		166,247
Derivative instruments	—		30,486		—		30,486
Total	$	—	$	2,997,019	$	—	$	2,997,019
Liabilities
Derivative instruments	$	—	$	24,939	$	—	$	24,939
Total	$	—	$	24,939	$	—	$	24,939
	December 31, 2014
	Level 1		Level 2		Level3		Total
Assets
Securities available for sale	$	—	$	2,158,853	$	—	$	2,158,853
Mortgage loans held for sale	—		139,950		—		139,950
Derivative instruments	—		32,903		—		32,903
Total	$	—	$	2,331,706	$	—	$	2,331,706
Liabilities
Derivative instruments	$	—	$	31,354	$	—	$	31,354
Total	$	—	$	31,354	$	—	$	31,354

Gains and Losses Included in Earnings Related to Asset and Liabilities Measured at Fair Value on Recurring Basis

Gains and losses (realized and unrealized) included in earnings (or accumulated other comprehensive income) during 2015 related to assets and liabilities measured at fair value on a recurring basis are reported in non-interest income or other comprehensive income as follows:

(Dollars in thousands)	Non-interest income		Other comprehensive income
Total gains (losses) included in earnings	$	2,939	$	—
Change in unrealized gains (losses) relating to assets still held at December 31, 2015	—		(9,110		)

Financial Asset and Liabilities Measured at Fair Value on Nonrecurring Basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a non-recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date in the tables below.

	December 31, 2015
(Dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets
OREO, net	$	—	$	1,106	$	—	$	1,106
Total	$	—	$	1,106	$	—	$	1,106
	December 31, 2014
(Dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets
OREO, net	$	—	$	1,483	$	—	$	1,483
Total	$	—	$	1,483	$	—	$	1,483

Summary of Difference Between the Aggregate Fair Value and the Aggregate Unpaid Principal Balance for Mortgage Loans Held for Sale

The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value:

	December 31, 2015						December 31, 2014
(Dollars in thousands)	Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal		Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal
Mortgage loans held for sale, at fair value	$	166,247	$	161,083	$	5,164	$	139,950	$	134,639	$	5,311