Condensed Consolidated Statement of Stockholders' Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended															3 Months Ended								12 Months Ended
	Nov. 11, 2014	Oct. 23, 2014	Jul. 24, 2014	Mar. 27, 2014	Jan. 29, 2014	Oct. 23, 2013	Jul. 23, 2013	Apr. 24, 2013	Jan. 30, 2013	Nov. 30, 2012	Oct. 30, 2012	Jul. 25, 2012	Jun. 26, 2012	Apr. 26, 2012	Feb. 01, 2012	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Merger issuance costs																								$ 489	$ 0	$ 0
Cash dividends declared on common stock (in usd per share)	$ 0.16	$ 0.09	$ 0.09	$ 0.08	$ 0.08	$ 0.08	$ 0.18	$ 0.08	$ 0.08	$ 0.30	$ 0.08	$ 0.08	$ 0.20	$ 0.08	$ 0.06	$ 0.25	$ 0.09	$ 0	$ 0.16	$ 0.08	$ 0.18	$ 0.08	$ 0.08	$ 0.50	$ 0.42	$ 0.80