Investments (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Cost and Fair Value of Securities Available-for-sale

The amortized cost and fair value of securities available for sale are as follows:

	As of December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available for sale:
Mortgage-backed securities	$	196,402	$	1,370	$	(2,381	)	$	195,391
	As of December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available for sale:
Mortgage-backed securities	$	167,740	$	2,686	$	(1,492	)	$	168,934

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value

The following table summarizes the amount of gross unrealized losses for our mortgage-backed securities and the estimated fair value by length of time the securities have been in an unrealized loss position:

	Less than 12 months					12 months or more					Total
	Gross unrealized losses			Estimated fair value		Gross unrealized losses			Estimated fair value		Gross unrealized losses			Estimated fair value
As of December 31, 2015:
Mortgage-backed securities	$	(827	)	$	73,802	$	(1,554	)	$	39,271	$	(2,381	)	$	113,073
As of December 31, 2014:
Mortgage-backed securities	$	(27	)	$	12,147	$	(1,465	)	$	41,462	$	(1,492	)	$	53,609

Amortized Cost and Fair Value of Securities by Contractual Maturities

As of December 31, 2015, the amortized cost and fair value of securities, by contractual maturities, are summarized below. Contractual maturities versus actual maturities may differ due to the effect of prepayments.

Year of Maturity	Amortized Cost		Estimated Fair Value
2038	$	284	$	307
2039	7,539		8,054
2042	22,336		21,282
2043	59,961		60,165
2044	47,833		47,815
2045	58,449		57,768
Total	$	196,402	$	195,391