Accumulated Other Comprehensive Income ("AOCI") (AOCI by component) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), Beginning Balance	$ 115,839	$ 72,556	$ 118,972	$ 46,921
OCI before reclassifications	6,608	9,818	(5,793)	35,453
Amounts reclassified from AOCI	646	0	(8,622)	0
Net current period OCI	5,962	9,818	2,829	35,453
Accumulated other comprehensive income (loss), Ending Balance	121,801	82,374	121,801	82,374
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), Beginning Balance	12,702	(30,538)	8,066	(19,368)
OCI before reclassifications	1,976	7,688	6,612	(3,482)
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	1,976	7,688	6,612	(3,482)
Accumulated other comprehensive income (loss), Ending Balance	14,678	(22,850)	14,678	(22,850)
Securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), Beginning Balance	114,290	117,561	130,505	78,448
OCI before reclassifications	5,656	3,685	(10,559)	42,798
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	5,656	3,685	(10,559)	42,798
Accumulated other comprehensive income (loss), Ending Balance	119,946	121,246	119,946	121,246
Pro-rata share of nonconsolidated subsidiaries' OCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), Beginning Balance	(3,821)	(9,941)	(12,058)	(9,319)
OCI before reclassifications	(626)	(915)	(1,657)	(1,537)
Amounts reclassified from AOCI	646	0	(8,622)	0
Net current period OCI	(1,272)	(915)	6,965	(1,537)
Accumulated other comprehensive income (loss), Ending Balance	(5,093)	(10,856)	(5,093)	(10,856)
Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), Beginning Balance	(7,332)	(4,526)	(7,541)	(2,840)
OCI before reclassifications	(398)	(640)	(189)	(2,326)
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	(398)	(640)	(189)	(2,326)
Accumulated other comprehensive income (loss), Ending Balance	$ (7,730)	$ (5,166)	$ (7,730)	$ (5,166)