Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2015

Derivative Instruments [Abstract]

Summary of derivative instruments

	March 31, 2015		December 31, 2014
Notional amount	$	3,773	$	3,811
Weighted average pay rate on interest-rate swaps		4.06%		4.06%
Weighted average receive rate on interest-rate swaps		0.19%		0.18%
Weighted average maturity (years)		4.0		4.3
Fair value of interest-rate swaps	$	(327)	$	(318)
Fair value of yield maintenance provisions		327		318